diff --git a/testcase/libmicro/libmicro.py b/testcase/libmicro/libmicro.py
index f383da4f4768e30c46994181a6ebb0a8908fc5ce..2e2cf635a04016140552dd30a2341933d001a26c 100644
--- a/testcase/libmicro/libmicro.py
+++ b/testcase/libmicro/libmicro.py
@@ -127,7 +127,9 @@ class PerfLibmicro(TSTPerf):
         if bench_name:
             # 内存类模式：从 CSV 参数动态拼接 test_opt
             test_opt = _build_test_opt(bench_name, s, l, g, T, I, B, r, w, f)
-            tool_path = f"tools/libmicro.install/build/{tool_name}"
+            tool_path = os.path.join(
+                _suite_top_dir, "tools/libmicro.install/build", tool_name
+            )
             label = "L0:内存"
         else:
             # 调度类模式：拼接参数
@@ -136,7 +138,9 @@ class PerfLibmicro(TSTPerf):
                 test_opt += f" -B {batch_size}"
             if samples:
                 test_opt += f" -C {samples}"
-            tool_path = f"tools/libmicro.install/build/{test_name}"
+            tool_path = os.path.join(
+                _suite_top_dir, "tools/libmicro.install/build", test_name
+            )
             label = "L0:调度"
 
         self._impl = PerfLibMicro(