diff --git a/frameworks/core/components/flex/render_flex.cpp b/frameworks/core/components/flex/render_flex.cpp
index c2f0bf906624047043454301200bad8ffcb6c73f..5e2050538fd8a0349f8115407a28de4e3ae239c7 100644
--- a/frameworks/core/components/flex/render_flex.cpp
+++ b/frameworks/core/components/flex/render_flex.cpp
@@ -280,6 +280,9 @@ void RenderFlex::PerformLayoutInWeightMode()
         LOGW("not supported infinite size");
         return;
     }
+    if (!relativeNodes_.empty()) {
+        maxMainSize -= GetSpace() * (relativeNodes_.size() - 1);
+    }
     BaselineProperties baselineProperties;
     LayoutParam innerLayout;
     double allocatedSize = allocatedSize_;