diff --git a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/controller/ProdMixTraceReportController.java b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/controller/ProdMixTraceReportController.java
index d5760fd0..3379528f 100644
--- a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/controller/ProdMixTraceReportController.java
+++ b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/controller/ProdMixTraceReportController.java
@@ -86,6 +86,12 @@ public class ProdMixTraceReportController extends BaseController {
         return R.ok(mixTraceReportService.calculateSpcXbarR(normalizeParams(params)));
     }
 
+    /** 按时间段获取最新一条曲线（仅曲线数据） */
+    @GetMapping("/curve/latest")
+    public R<MixTraceDetailVo> latestCurve(@RequestParam(required = false) Map<String, Object> params) {
+        return R.ok(mixTraceReportService.queryLatestCurve(normalizeParams(params)));
+    }
+
     private Map<String, Object> normalizeParams(Map<String, Object> params) {
         return params == null ? Collections.emptyMap() : params;
     }
diff --git a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/mapper/ProdMixTraceReportMapper.java b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/mapper/ProdMixTraceReportMapper.java
index c1cd54e1..9c75677a 100644
--- a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/mapper/ProdMixTraceReportMapper.java
+++ b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/mapper/ProdMixTraceReportMapper.java
@@ -79,4 +79,6 @@ public interface ProdMixTraceReportMapper {
      */
     List<MixTraceSpcSampleVo> selectSpcSamples(@Param("map") Map<String, Object> params);
 
+    /** 按时间段获取最新一条记录的工步列表（用于曲线） */
+    List<MixTraceStepVo> selectLatestStepList(@Param("map") Map<String, Object> params);
 }
diff --git a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/service/IProdMixTraceReportService.java b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/service/IProdMixTraceReportService.java
index 2638137e..ddc1be47 100644
--- a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/service/IProdMixTraceReportService.java
+++ b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/service/IProdMixTraceReportService.java
@@ -52,4 +52,9 @@ public interface IProdMixTraceReportService {
      * SPC均值极差图 - 图10（Xbar-R）
      */
     MixTraceSpcResultVo calculateSpcXbarR(Map<String, Object> params);
+
+    /**
+     * 按时间段获取最新一条曲线（仅曲线数据，适用于单次查看）
+     */
+    MixTraceDetailVo queryLatestCurve(Map<String, Object> params);
 }
diff --git a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/service/impl/ProdMixTraceReportServiceImpl.java b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/service/impl/ProdMixTraceReportServiceImpl.java
index 963db48d..870a333c 100644
--- a/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/service/impl/ProdMixTraceReportServiceImpl.java
+++ b/ruoyi-modules/hwmom-mes/src/main/java/org/dromara/mes/service/impl/ProdMixTraceReportServiceImpl.java
@@ -720,4 +720,19 @@ public class ProdMixTraceReportServiceImpl implements IProdMixTraceReportService
         tree.add(root);
         return tree;
     }
+
+    @Override
+    public MixTraceDetailVo queryLatestCurve(Map<String, Object> params) {
+        // 只关注曲线所需的工步数据，其他列表返回空集合以避免前端 NPE
+        List<MixTraceStepVo> steps = mixTraceReportMapper.selectLatestStepList(params);
+        MixTraceDetailVo detail = new MixTraceDetailVo();
+        detail.setMixingStepList(steps == null ? new ArrayList<>() : steps);
+        detail.setCurveSeries(buildCurveSeries(steps));
+        detail.setUsageList(new ArrayList<>());
+        detail.setBatchList(new ArrayList<>());
+        detail.setMaterialTraceTree(new ArrayList<>());
+        detail.setMixingList(new ArrayList<>());
+        detail.setWeightList(new ArrayList<>());
+        return detail;
+    }
 }
diff --git a/ruoyi-modules/hwmom-mes/src/main/resources/mapper/mes/ProdMixTraceReportMapper.xml b/ruoyi-modules/hwmom-mes/src/main/resources/mapper/mes/ProdMixTraceReportMapper.xml
index 4504ff3f..d6246ecc 100644
--- a/ruoyi-modules/hwmom-mes/src/main/resources/mapper/mes/ProdMixTraceReportMapper.xml
+++ b/ruoyi-modules/hwmom-mes/src/main/resources/mapper/mes/ProdMixTraceReportMapper.xml
@@ -618,27 +618,7 @@
 
                     SELECT
                         CAST(9 AS INT) AS matchPriority,
-                        CAST(
-                            CASE
-                                WHEN ISNULL(SUM(CASE WHEN t.materiel_id = w.child_code THEN 1 ELSE 0 END), 0) = 0
-                                 AND ISNULL(SUM(CASE
-                                                    WHEN w.father_code IS NOT NULL
-                                                     AND w.father_code &lt;&gt; w.child_code
-                                                     AND t.materiel_id = w.father_code THEN 1
-                                                    ELSE 0
-                                                END), 0) = 0
-                                THEN NULL
-                                ELSE
-                                    ISNULL(SUM(CASE WHEN t.materiel_id = w.child_code THEN ISNULL(t.used_amount, 0) ELSE 0 END), 0)
-                                    + ISNULL(SUM(CASE
-                                                     WHEN w.father_code IS NOT NULL
-                                                      AND w.father_code &lt;&gt; w.child_code
-                                                      AND t.materiel_id = w.father_code
-                                                     THEN ISNULL(t.used_amount, 0)
-                                                     ELSE 0
-                                                 END), 0)
-                            END
-                        AS DECIMAL(18, 4)) AS actualWeight,
+                        CAST(CASE WHEN COUNT(1) = 0 THEN NULL ELSE SUM(ISNULL(t.used_amount, 0)) END AS DECIMAL(18, 4)) AS actualWeight,
                         MAX(t.plan_detail_id) AS tracePlanDetailId,
                         MAX(t.recipe_id) AS traceRecipeId,
                         MAX(t.weight_seq) AS traceWeightSeq,
@@ -755,6 +735,110 @@
         ORDER BY m.mix_id ASC
     </select>
 
+    <!-- 时间段内所有工步列表，用于生成曲线（不再只取最新一条） -->
+    <select id="selectLatestStepList" resultType="org.dromara.mes.domain.vo.MixTraceStepVo">
+        <include refid="routerMasterDataCte"/>
+        SELECT
+            ri.recipe_id AS recipeId,
+            ri.recipe_code AS recipeCode,
+            ri.machine_id AS machineId,
+            bm.machine_name AS machineName,
+            ri.material_id AS materialId,
+            bmi.material_name AS materialName,
+            tp.trainNumber AS trainNumber,
+            COALESCE(tp.planRealBeginTime, tp.detailRealBeginTime, ri.create_time) AS realBeginTime,
+            COALESCE(tp.planRealEndTime, tp.detailRealEndTime, ri.create_time) AS realEndTime,
+            m.mixing_id AS mixingId,
+            m.mix_id AS mixId,
+            SUM(ISNULL(m.mixing_time, 0)) OVER (PARTITION BY ri.recipe_id ORDER BY m.mix_id ROWS UNBOUNDED PRECEDING) AS timelineSecond,
+            RTRIM(LTRIM(COALESCE(m.term_code, ''))) AS termCode,
+            CASE
+                WHEN term_detail.data_detail_name IS NULL OR LTRIM(RTRIM(term_detail.data_detail_name)) = '' THEN RTRIM(LTRIM(COALESCE(m.term_code, '')))
+                ELSE RTRIM(LTRIM(term_detail.data_detail_name))
+            END AS termName,
+            RTRIM(LTRIM(COALESCE(m.cond_code, ''))) AS condCode,
+            CASE
+                WHEN cond_detail.data_detail_name IS NULL OR LTRIM(RTRIM(cond_detail.data_detail_name)) = '' THEN RTRIM(LTRIM(COALESCE(m.cond_code, '')))
+                ELSE RTRIM(LTRIM(cond_detail.data_detail_name))
+            END AS condName,
+            RTRIM(LTRIM(COALESCE(m.act_code, ''))) AS actCode,
+            CASE
+                WHEN act_detail.data_detail_name IS NULL OR LTRIM(RTRIM(act_detail.data_detail_name)) = '' THEN RTRIM(LTRIM(COALESCE(m.act_code, '')))
+                ELSE RTRIM(LTRIM(act_detail.data_detail_name))
+            END AS actName,
+            m.mixing_time AS mixingTime,
+            m.mixing_temp AS mixingTemp,
+            m.mixing_energy AS mixingEnergy,
+            m.mixing_power AS mixingPower,
+            m.mixing_press AS mixingPress,
+            m.mixing_speed AS mixingSpeed,
+            m.set_time AS setTime,
+            m.set_temp AS setTemp,
+            m.set_energy AS setEnergy,
+            m.set_power AS setPower,
+            m.set_pres AS setPres,
+            m.set_rota AS setRota
+        FROM prod_recipe_info ri
+        LEFT JOIN prod_base_machine_info bm ON bm.machine_id = ri.machine_id
+        LEFT JOIN base_material_info bmi ON bmi.material_id = ri.material_id
+        OUTER APPLY (
+            <include refid="tracePickApply"/>
+        ) tp
+        JOIN prod_recipe_mixing m ON m.recipe_id = ri.recipe_id AND m.del_flag = '0'
+        CROSS JOIN router_master_data rmd
+        OUTER APPLY (
+            SELECT TOP 1 d.data_detail_name
+            FROM sys_master_data_detail d
+            WHERE d.del_flag = '0'
+              AND d.active_flag = '1'
+              AND d.master_data_id = rmd.term_master_data_id
+              AND RTRIM(LTRIM(COALESCE(d.data_detail_code, ''))) = RTRIM(LTRIM(COALESCE(m.term_code, '')))
+            ORDER BY d.master_data_detail_id DESC
+        ) term_detail
+        OUTER APPLY (
+            SELECT TOP 1 d.data_detail_name
+            FROM sys_master_data_detail d
+            WHERE d.del_flag = '0'
+              AND d.active_flag = '1'
+              AND d.master_data_id = rmd.term_master_data_id
+              AND RTRIM(LTRIM(COALESCE(d.data_detail_code, ''))) = RTRIM(LTRIM(COALESCE(m.cond_code, '')))
+            ORDER BY d.master_data_detail_id DESC
+        ) cond_detail
+        OUTER APPLY (
+            SELECT TOP 1 d.data_detail_name
+            FROM sys_master_data_detail d
+            WHERE d.del_flag = '0'
+              AND d.active_flag = '1'
+              AND d.master_data_id = rmd.act_master_data_id
+              AND RTRIM(LTRIM(COALESCE(d.data_detail_code, ''))) = RTRIM(LTRIM(COALESCE(m.act_code, '')))
+            ORDER BY d.master_data_detail_id DESC
+        ) act_detail
+        WHERE ri.del_flag = '0'
+        <if test="map.machineId != null and map.machineId != ''">
+            AND ri.machine_id = #{map.machineId}
+        </if>
+        <if test="map.machineName != null and map.machineName != ''">
+            AND bm.machine_name LIKE CONCAT('%', #{map.machineName}, '%')
+        </if>
+        <if test="map.recipeId != null and map.recipeId != ''">
+            AND ri.recipe_id = #{map.recipeId}
+        </if>
+        <if test="map.recipeCode != null and map.recipeCode != ''">
+            AND ri.recipe_code LIKE CONCAT('%', #{map.recipeCode}, '%')
+        </if>
+        <if test="map.materialId != null and map.materialId != ''">
+            AND ri.material_id = #{map.materialId}
+        </if>
+        <if test="map.materialName != null and map.materialName != ''">
+            AND bmi.material_name LIKE CONCAT('%', #{map.materialName}, '%')
+        </if>
+        <if test="map.beginDate != null and map.beginDate != '' and map.endDate != null and map.endDate != ''">
+            AND ri.create_time &gt;= CAST(CONCAT(#{map.beginDate}, ' 00:00:00') AS DATETIME)
+            AND ri.create_time &lt; DATEADD(DAY, 1, CAST(#{map.endDate} AS DATE))
+        </if>
+        ORDER BY COALESCE(tp.planRealBeginTime, tp.detailRealBeginTime, ri.create_time) DESC, ri.create_time DESC, m.mix_id ASC
+    </select>
+
     <!-- trace detail step list -->
     <select id="selectTraceStepList" resultType="org.dromara.mes.domain.vo.MixTraceStepVo">
         <include refid="routerMasterDataCte"/>