diff --git a/samples/doris-demo/doris-source-demo/src/main/java/org/apache/doris/sdk/DorisReaderExample.java b/samples/doris-demo/doris-source-demo/src/main/java/org/apache/doris/sdk/DorisReaderExample.java
index 5c4a5c101b..03bebef58d 100644
--- a/samples/doris-demo/doris-source-demo/src/main/java/org/apache/doris/sdk/DorisReaderExample.java
+++ b/samples/doris-demo/doris-source-demo/src/main/java/org/apache/doris/sdk/DorisReaderExample.java
@@ -166,7 +166,7 @@ public class DorisReaderExample {
                 if(!eos){
                     int i = convertArrow(next, selectedColumns);
                     offset += i;
-                    readRowCount += offset;
+                    readRowCount = offset;
                 }
             }
             //close