diff --git a/jeecg-module-spectrum-analysis/src/main/java/org/jeecg/modules/service/impl/SelfStationServiceImpl.java b/jeecg-module-spectrum-analysis/src/main/java/org/jeecg/modules/service/impl/SelfStationServiceImpl.java
index b2cd4644..5053419b 100644
--- a/jeecg-module-spectrum-analysis/src/main/java/org/jeecg/modules/service/impl/SelfStationServiceImpl.java
+++ b/jeecg-module-spectrum-analysis/src/main/java/org/jeecg/modules/service/impl/SelfStationServiceImpl.java
@@ -1694,9 +1694,9 @@ public class SelfStationServiceImpl implements ISelfStationService {
             }
             //Beta-Gamma Spectrum: QC  散点图相关数据
             List<HistogramData> histogramDataList = new LinkedList<>();
-            for (int column=0; column<bChannels; column++) {
-                for (int row=0; row<gChannels; row++) {
-                    Long index = column * gChannels + row;
+            for (int column=0; column<gChannels; column++) {
+                for (int row=0; row<bChannels; row++) {
+                    Long index = column * bChannels + row;
                     long count = hCounts.get(index.intValue());
                     if (count>0) {
                         HistogramData histogramData = new HistogramData();