diff --git a/ylong_runtime/src/builder/multi_thread_builder.rs b/ylong_runtime/src/builder/multi_thread_builder.rs
index 397ab68b64cbc0390aa78a068c5d1fdd4db9a914..51ac3d3afbcf80574834306f5831eb00ddd601c7 100644
--- a/ylong_runtime/src/builder/multi_thread_builder.rs
+++ b/ylong_runtime/src/builder/multi_thread_builder.rs
@@ -15,7 +15,8 @@ use std::io;
 use std::sync::Mutex;
 
 cfg_ffrt!(
-    use ylong_ffrt::{ffrt_set_cpu_worker_max_num, ffrt_set_worker_stack_size, Qos};
+    // use ylong_ffrt::{ffrt_set_cpu_worker_max_num, ffrt_set_worker_stack_size, Qos};
+    use ylong_ffrt::{ffrt_set_worker_stack_size, Qos};
     use std::collections::HashMap;
     use libc::{c_uint, c_ulong};
     use std::time::Duration;
@@ -69,7 +70,7 @@ impl MultiThreadBuilder {
         #[cfg(feature = "ffrt")]
         unsafe {
             for (qos, worker_num) in self.thread_num_by_qos.iter() {
-                ffrt_set_cpu_worker_max_num(*qos, *worker_num as c_uint);
+                // ffrt_set_cpu_worker_max_num(*qos, *worker_num as c_uint);
             }
 
             for (qos, stack_size) in self.common.stack_size_by_qos.iter() {