diff --git a/sentinel-extension/sentinel-parameter-flow-control/src/main/java/com/alibaba/csp/sentinel/slots/block/flow/param/ParameterMetric.java b/sentinel-extension/sentinel-parameter-flow-control/src/main/java/com/alibaba/csp/sentinel/slots/block/flow/param/ParameterMetric.java
index a5ab902c27..577f353ce6 100644
--- a/sentinel-extension/sentinel-parameter-flow-control/src/main/java/com/alibaba/csp/sentinel/slots/block/flow/param/ParameterMetric.java
+++ b/sentinel-extension/sentinel-parameter-flow-control/src/main/java/com/alibaba/csp/sentinel/slots/block/flow/param/ParameterMetric.java
@@ -141,6 +141,10 @@ public void decreaseThreadCount(Object... args) {
                 if (arg == null) {
                     continue;
                 }
+                if (arg instanceof ParamFlowArgument) {
+                    arg = ((ParamFlowArgument) arg).paramFlowKey();
+                }
+
                 if (Collection.class.isAssignableFrom(arg.getClass())) {
 
                     for (Object value : ((Collection)arg)) {
@@ -201,6 +205,9 @@ public void addThreadCount(Object... args) {
                 if (arg == null) {
                     continue;
                 }
+                if (arg instanceof ParamFlowArgument) {
+                    arg = ((ParamFlowArgument) arg).paramFlowKey();
+                }
 
                 if (Collection.class.isAssignableFrom(arg.getClass())) {
                     for (Object value : ((Collection)arg)) {