diff --git a/src/views/ems/report/vibrationBoard/anomaly/index.vue b/src/views/ems/report/vibrationBoard/anomaly/index.vue
index 59746f2..f200731 100644
--- a/src/views/ems/report/vibrationBoard/anomaly/index.vue
+++ b/src/views/ems/report/vibrationBoard/anomaly/index.vue
@@ -8,7 +8,7 @@
       show-metric
       @update:time-range="setTimeRange"
       @update:sampling-interval="setSamplingInterval"
-      @update:vibration-param="setVibrationParam"
+      @update:vibration-param="handleMetricChange"
       @query="handleQuery"
     />
 
@@ -132,6 +132,7 @@ const {
   setTimeRange,
   setSamplingInterval,
   setVibrationParam,
+  resetAnomalyThresholds,
   buildQuery
 } = useVibrationBoardQueryState();
 
@@ -151,6 +152,12 @@ const applyThresholdDefaults = (data?: VibrationAnomalyPageVO) => {
   queryForm.value.stddevThreshold = Number(data.stddevThreshold ?? queryForm.value.stddevThreshold ?? 0);
 };
 
+const handleMetricChange = (value: string) => {
+  // 切换指标后先清空旧阈值覆盖，再触发查询，这样后端才能按新指标返回正确默认阈值。
+  resetAnomalyThresholds();
+  setVibrationParam(value);
+};
+
 const handleQuery = async () => {
   loading.value = true;
   try {
diff --git a/src/views/ems/report/vibrationBoard/comparison/index.vue b/src/views/ems/report/vibrationBoard/comparison/index.vue
index 8365c89..2509c2b 100644
--- a/src/views/ems/report/vibrationBoard/comparison/index.vue
+++ b/src/views/ems/report/vibrationBoard/comparison/index.vue
@@ -98,7 +98,7 @@ const renderCharts = () => {
     series: [
       {
         type: 'scatter',
-        symbolSize: (value: any[]) => Math.max(12, Math.min(30, value[2] * 2)),
+        symbolSize: (value: any[]) => Math.max(12, Math.min(40, 8 + Math.log(toNumber(value[2]) + 1) * 3)),
         itemStyle: { color: metricColorMap[comparisonData.value.metricField || queryForm.value.vibrationParam] || '#5b8ff9', opacity: 0.8 },
         label: { show: true, formatter: (params: any) => params.value[3], position: 'top', fontSize: 11 },
         data: (comparisonData.value.scatterItems || []).map((item) => [
diff --git a/src/views/ems/report/vibrationBoard/components/useVibrationBoardQueryState.ts b/src/views/ems/report/vibrationBoard/components/useVibrationBoardQueryState.ts
index bbd750f..352b84d 100644
--- a/src/views/ems/report/vibrationBoard/components/useVibrationBoardQueryState.ts
+++ b/src/views/ems/report/vibrationBoard/components/useVibrationBoardQueryState.ts
@@ -2,30 +2,61 @@ import { getMonitorInfoTree } from '@/api/ems/base/baseMonitorInfo';
 import type { VibrationBoardQuery } from '@/api/ems/types';
 import { createDefaultTimeRange } from './vibrationBoardShared';
 
+type VibrationBoardQueryForm = {
+  compareScope: string;
+  monitorId: string;
+  monitorIds: string[];
+  selectionLabel: string;
+  samplingInterval: number;
+  vibrationParam: string;
+  highThreshold: number | undefined;
+  warningThreshold: number | undefined;
+  minContinuousSamples: number | undefined;
+  rapidRiseThreshold: number | undefined;
+  stddevThreshold: number | undefined;
+};
+
+type BuildQueryOptions = {
+  includeVibrationParam?: boolean;
+};
+
+const createDefaultQueryForm = (defaultMetric = 'vibrationSpeed'): VibrationBoardQueryForm => ({
+  compareScope: 'all',
+  monitorId: '',
+  monitorIds: [],
+  selectionLabel: '全部振动设备',
+  samplingInterval: 5,
+  vibrationParam: defaultMetric,
+  highThreshold: undefined,
+  warningThreshold: undefined,
+  minContinuousSamples: undefined,
+  rapidRiseThreshold: undefined,
+  stddevThreshold: undefined
+});
+
+// 模块级缓存：同一浏览器会话内 7 个页面共享设备树与查询状态，避免重复请求和切页丢筛选。
+const sharedState = reactive({
+  treeLoaded: false,
+  monitorTreeOptions: [] as any[],
+  deviceDisplayMap: {} as Record<string, string>,
+  daterangeRecordTime: createDefaultTimeRange() as string[],
+  queryForm: createDefaultQueryForm()
+});
+
 export function useVibrationBoardQueryState(defaultMetric = 'vibrationSpeed') {
-  const state = reactive({
+  const localState = reactive({
     loading: false,
     treeLoading: false,
-    monitorTreeOptions: [] as any[],
-    treeProps: { label: 'label', children: 'children' },
-    deviceDisplayMap: {} as Record<string, string>,
-    daterangeRecordTime: createDefaultTimeRange() as string[],
-    queryForm: {
-      compareScope: 'all',
-      monitorId: '',
-      monitorIds: [] as string[],
-      selectionLabel: '全部振动设备',
-      samplingInterval: 5,
-      vibrationParam: defaultMetric,
-      highThreshold: undefined as number | undefined,
-      warningThreshold: undefined as number | undefined,
-      minContinuousSamples: undefined as number | undefined,
-      rapidRiseThreshold: undefined as number | undefined,
-      stddevThreshold: undefined as number | undefined
-    }
+    treeProps: { label: 'label', children: 'children' }
   });
 
-  const { loading, treeLoading, monitorTreeOptions, treeProps, deviceDisplayMap, daterangeRecordTime, queryForm } = toRefs(state);
+  // 仅在首次进入页面时应用默认主看指标，后续页面切换沿用用户最新选择。
+  if (!sharedState.queryForm.vibrationParam) {
+    sharedState.queryForm.vibrationParam = defaultMetric;
+  }
+
+  const { loading, treeLoading, treeProps } = toRefs(localState);
+  const { monitorTreeOptions, deviceDisplayMap, daterangeRecordTime, queryForm } = toRefs(sharedState);
   const deviceCount = computed(() => queryForm.value.monitorIds?.length || (queryForm.value.monitorId ? 1 : 0));
   const hasMultiDevice = computed(() => deviceCount.value > 1 || ['group', 'all'].includes(queryForm.value.compareScope));
 
@@ -68,12 +99,27 @@ export function useVibrationBoardQueryState(defaultMetric = 'vibrationSpeed') {
     queryForm.value.vibrationParam = value;
   };
 
+  const resetAnomalyThresholds = () => {
+    // 主看指标切换后必须回到“未覆盖”状态，让后端按新指标重新下发默认阈值，
+    // 否则会把上一指标的阈值误当成当前指标的用户自定义值。
+    queryForm.value.highThreshold = undefined;
+    queryForm.value.warningThreshold = undefined;
+    queryForm.value.minContinuousSamples = undefined;
+    queryForm.value.rapidRiseThreshold = undefined;
+    queryForm.value.stddevThreshold = undefined;
+  };
+
   const loadTree = async () => {
+    // 已加载且有缓存时直接复用，避免 7 个页面重复打同一个树接口。
+    if (sharedState.treeLoaded) {
+      return;
+    }
     treeLoading.value = true;
     try {
       const response = await getMonitorInfoTree({ monitorType: 10 });
       monitorTreeOptions.value = response.data || [];
       deviceDisplayMap.value = buildDeviceDisplayMap(monitorTreeOptions.value);
+      sharedState.treeLoaded = true;
       if (!queryForm.value.monitorIds.length && !queryForm.value.monitorId) {
         applySelection(buildSelection(getLeafNodes(monitorTreeOptions.value), '全部振动设备', 'all'));
       }
@@ -91,9 +137,11 @@ export function useVibrationBoardQueryState(defaultMetric = 'vibrationSpeed') {
     applySelection(buildSelection([data], data.label, 'single'));
   };
 
-  const buildQuery = (): VibrationBoardQuery => ({
+  const buildQuery = (options?: BuildQueryOptions): VibrationBoardQuery => ({
     samplingInterval: queryForm.value.samplingInterval,
-    vibrationParam: queryForm.value.vibrationParam,
+    // 质量页不展示主看指标时，必须禁掉这个隐藏筛选条件，
+    // 否则会继承其它页面的指标选择，悄悄改变质量统计口径。
+    vibrationParam: options?.includeVibrationParam === false ? undefined : queryForm.value.vibrationParam,
     beginRecordTime: daterangeRecordTime.value[0],
     endRecordTime: daterangeRecordTime.value[1],
     highThreshold: queryForm.value.highThreshold,
@@ -125,6 +173,7 @@ export function useVibrationBoardQueryState(defaultMetric = 'vibrationSpeed') {
     setTimeRange,
     setSamplingInterval,
     setVibrationParam,
+    resetAnomalyThresholds,
     buildQuery,
     getMonitorDisplayName
   };
diff --git a/src/views/ems/report/vibrationBoard/distribution/index.vue b/src/views/ems/report/vibrationBoard/distribution/index.vue
index 2355dbc..f132438 100644
--- a/src/views/ems/report/vibrationBoard/distribution/index.vue
+++ b/src/views/ems/report/vibrationBoard/distribution/index.vue
@@ -82,6 +82,13 @@ const distributionData = ref<VibrationDistributionPageVO>({
 
 const toNumber = (value: number | string | undefined) => Number(value ?? 0);
 
+const clearCharts = () => {
+  intervalChart.value?.setData(null);
+  histogramChart.value?.setData(null);
+  calendarChart.value?.setData(null);
+  hourlyChart.value?.setData(null);
+};
+
 const renderCharts = () => {
   const intervalData = distributionData.value.intervalBuckets || [];
   const histogramData = distributionData.value.histogramBuckets || [];
@@ -89,6 +96,8 @@ const renderCharts = () => {
   const hourlyData = (distributionData.value.hourlyHeatmap || []).map((item) => [toNumber(item.statHour), item.statDate, toNumber(item.avgValue)]);
   const days = [...new Set(hourlyData.map((item) => item[1] as string))].sort();
   if (!intervalData.length && !histogramData.length && !calendarData.length && !hourlyData.length) {
+    // 查询结果为空时必须主动清空实例，否则会残留上一轮图表数据误导用户。
+    clearCharts();
     return;
   }
 
diff --git a/src/views/ems/report/vibrationBoard/quality/index.vue b/src/views/ems/report/vibrationBoard/quality/index.vue
index f5787cc..c2604cc 100644
--- a/src/views/ems/report/vibrationBoard/quality/index.vue
+++ b/src/views/ems/report/vibrationBoard/quality/index.vue
@@ -87,7 +87,8 @@ const renderChart = () => {
 const handleQuery = async () => {
   loading.value = true;
   try {
-    const { data } = await getVibrationQualityData(buildQuery());
+    // 质量页统计的是整批振动样本的数据完整性，不能继承其它页面隐藏的主看指标过滤口径。
+    const { data } = await getVibrationQualityData(buildQuery({ includeVibrationParam: false }));
     qualityData.value = data || { metricQualityItems: [] };
     await nextTick();
     renderChart();