diff --git a/jeecg-module-spectrum-analysis/src/main/java/org/jeecg/common/util/PHDFileUtil.java b/jeecg-module-spectrum-analysis/src/main/java/org/jeecg/common/util/PHDFileUtil.java
index b9d944e1..84f78490 100644
--- a/jeecg-module-spectrum-analysis/src/main/java/org/jeecg/common/util/PHDFileUtil.java
+++ b/jeecg-module-spectrum-analysis/src/main/java/org/jeecg/common/util/PHDFileUtil.java
@@ -115,8 +115,8 @@ public class PHDFileUtil extends AbstractLogOrReport {
             List<Long> hCounts = struct.h_counts;
             List<HistogramData> histogramDataList = new LinkedList<>();
             List<HistogramData> histogramDataDList = new LinkedList<>();
-            for (int i=0; i<bChannels; i++){
-                for (int j=0; j< gChannels; j++){
+            for (int i=0; i<gChannels; i++){
+                for (int j=0; j< bChannels; j++){
                     Long index = i * bChannels + j;
                     Long count = hCounts.get(index.intValue());
                     if (count > 0){