diff --git a/op-modules/op-quality/src/main/java/com/op/quality/service/impl/QcProCheckServiceImpl.java b/op-modules/op-quality/src/main/java/com/op/quality/service/impl/QcProCheckServiceImpl.java
index 42cdfcb7a..ff5e10b0d 100644
--- a/op-modules/op-quality/src/main/java/com/op/quality/service/impl/QcProCheckServiceImpl.java
+++ b/op-modules/op-quality/src/main/java/com/op/quality/service/impl/QcProCheckServiceImpl.java
@@ -247,7 +247,7 @@ public class QcProCheckServiceImpl implements QcProCheckService {
                 }
                 if (StringUtils.isNotBlank(qcd.getSamplingPlan())){
                     //抽样算法
-                    if (StringUtils.isNotBlank(qcd.getSampleQuality())){
+                    if (!StringUtils.isNotEmpty(qcd.getSampleQuality())){
                         String letter = GB2828Sampler.getSampleSizeLetter(qcd.getQuality().setScale(0, RoundingMode.HALF_UP).intValue(), qcd.getSamplingPlan());
                         int sampleSize = GB2828Sampler.getSampleSize(letter);
                         qcd.setSampleQuality(String.valueOf(sampleSize));