diff --git a/source/libs/command/inc/commandInt.h b/source/libs/command/inc/commandInt.h
index d7ded9d6f1..25894e9af7 100644
--- a/source/libs/command/inc/commandInt.h
+++ b/source/libs/command/inc/commandInt.h
@@ -69,6 +69,10 @@ extern "C" {
 #define EXPLAIN_EVENT_END_FORMAT "End Cond: "
 #define EXPLAIN_GROUP_CACHE_FORMAT "Group Cache"
 #define EXPLAIN_DYN_QRY_CTRL_FORMAT "Dynamic Query Control for %s"
+#define EXPLAIN_COUNT_FORMAT "Count"
+#define EXPLAIN_COUNT_INFO_FORMAT "Window Count Info"
+#define EXPLAIN_COUNT_NUM_FORMAT "Window Count=%d"
+#define EXPLAIN_COUNT_SLIDING_FORMAT "Window Sliding=%d"
 
 #define EXPLAIN_PLANNING_TIME_FORMAT "Planning Time: %.3f ms"
 #define EXPLAIN_EXEC_TIME_FORMAT "Execution Time: %.3f ms"
diff --git a/source/libs/command/src/explain.c b/source/libs/command/src/explain.c
index 66b50bcb47..ebe8543fae 100644
--- a/source/libs/command/src/explain.c
+++ b/source/libs/command/src/explain.c
@@ -1735,6 +1735,31 @@ int32_t qExplainResNodeToRowsImpl(SExplainResNode *pResNode, SExplainCtx *ctx, i
       }
       break;
     }
+    case QUERY_NODE_PHYSICAL_PLAN_MERGE_COUNT: {
+      SCountWinodwPhysiNode *pCountNode = (SCountWinodwPhysiNode *)pNode;
+      EXPLAIN_ROW_NEW(level, EXPLAIN_COUNT_FORMAT);
+      EXPLAIN_ROW_APPEND(EXPLAIN_LEFT_PARENTHESIS_FORMAT);
+      if (pResNode->pExecInfo) {
+        QRY_ERR_RET(qExplainBufAppendExecInfo(pResNode->pExecInfo, tbuf, &tlen));
+        EXPLAIN_ROW_APPEND(EXPLAIN_BLANK_FORMAT);
+      }
+      EXPLAIN_ROW_APPEND(EXPLAIN_FUNCTIONS_FORMAT, pCountNode->window.pFuncs->length);
+      EXPLAIN_ROW_APPEND(EXPLAIN_BLANK_FORMAT);
+      EXPLAIN_ROW_APPEND(EXPLAIN_WIDTH_FORMAT, pCountNode->window.node.pOutputDataBlockDesc->totalRowSize);
+      EXPLAIN_ROW_APPEND(EXPLAIN_RIGHT_PARENTHESIS_FORMAT);
+      EXPLAIN_ROW_END();
+      QRY_ERR_RET(qExplainResAppendRow(ctx, tbuf, tlen, level));
+
+      if (verbose) {
+        EXPLAIN_ROW_NEW(level + 1, EXPLAIN_COUNT_NUM_FORMAT, pCountNode->windowCount);
+        EXPLAIN_ROW_END();
+        QRY_ERR_RET(qExplainResAppendRow(ctx, tbuf, tlen, level + 1));
+        EXPLAIN_ROW_NEW(level + 1, EXPLAIN_COUNT_SLIDING_FORMAT, pCountNode->windowSliding);
+        EXPLAIN_ROW_END();
+        QRY_ERR_RET(qExplainResAppendRow(ctx, tbuf, tlen, level + 1));
+      }
+      break;
+    }
     default:
       qError("not supported physical node type %d", pNode->type);
       return TSDB_CODE_APP_ERROR;