diff --git a/msmonitor/docs/nputrace.md b/msmonitor/docs/nputrace.md
index 5e5e52737c49d4f2e1b79033d5dd4aa3b1a3b052..bde975fd7e12e7e931bc7a8c433ae18dbb40d881 100644
--- a/msmonitor/docs/nputrace.md
+++ b/msmonitor/docs/nputrace.md
@@ -24,9 +24,9 @@ nputrace的SUBCOMMANDS（子命令）选项如下：
 | --process-limit       | u64 | 最大采集进程的数量，默认值3，dynolog原生参数                                                                                                                                                                                                                                                         |     N     |      N      | N |
 | --profile-start-time  | u64 | 用于同步采集的Unix时间戳，单位毫秒，默认值0，dynolog原生参数                                                                                                                                                                                                                                               |     N     |      N      | N |
 | --duration-ms         | u64 | 采集的周期，单位毫秒，默认值500，dynolog原生参数                                                                                                                                                                                                                                                      |     N     |      N      | N |
-| --iterations          | i64 | 采集总迭代数，默认值-1，dynolog原生参数，需与start-step参数同时指定                                                                                                                                                                                                                                        |     Y     |      Y      |  Y |
+| --iterations          | i64 | 采集总迭代数，dynolog原生参数，需与start-step参数同时指定                                                                                                                                                                                                                                        |     Y     |      Y      |  Y |
 | --log-file            | String | 采集落盘的路径                                                                                                                                                                                                                                                                            |     Y     |      Y      |  Y |
-| --start-step          | i64 | 开始采集的迭代数，默认值0，设置为-1时表示从下一个step开始采集                                                                                                                                                                                                                                                 |     Y     |      Y      | Y  |
+| --start-step          | i64 | 开始采集的迭代数，设置为-1时表示从下一个step开始采集                                                                                                                                                                                                                                                 |     Y     |      Y      | Y  |
 | --record-shapes       | action | 是否采集算子的InputShapes和InputTypes，设置参数采集，默认不采集                                                                                                                                                                                                                                         |     Y     |      Y      |  N |
 | --profile-memory      | action | 是否采集算子内存信息，设置参数采集，默认不采集                                                                                                                                                                                                                                                            |     Y     |      Y      | N |
 | --with-stack          | action | 是否采集Python调用栈，设置参数采集，默认不采集                                                                                                                                                                                                                                                         |     Y     |      Y      | N |
diff --git a/msmonitor/dynolog_npu/cli/src/main.rs b/msmonitor/dynolog_npu/cli/src/main.rs
index a04594c24bf83d1a4118a7676f244154acd3ed81..0c597ce046a0ff9d54c1ec299a2ad39b3876189f 100644
--- a/msmonitor/dynolog_npu/cli/src/main.rs
+++ b/msmonitor/dynolog_npu/cli/src/main.rs
@@ -113,6 +113,14 @@ fn parse_start_step(src: &str) -> Result<i64, String> {
     Ok(start_step)
 }
 
+fn parse_iterations(src: &str) -> Result<i64, String> {
+    let iterations = src.trim().parse::<i64>().map_err(|e| format!("{}", e))?;
+    if iterations < 0 {
+        return Err(format!("Must be non-negative integer or {}", 0));
+    }
+    Ok(iterations)
+}
+
 #[derive(Debug, Parser)]
 enum Command {
     /// Check the status of a dynolog process
@@ -174,7 +182,7 @@ enum Command {
         #[clap(long, default_value_t = 500)]
         duration_ms: u64,
         /// Training iterations to collect, this takes precedence over duration.
-        #[clap(long, default_value_t = -1, allow_negative_numbers = true)]
+        #[clap(long, value_parser = parse_iterations, allow_negative_numbers = true)]
         iterations: i64,
         /// Log file for trace.
         #[clap(long)]
@@ -183,7 +191,7 @@ enum Command {
         #[clap(long, default_value_t = 0)]
         profile_start_time: u64,
         /// Number of steps to start profile, -1 means start from next step.
-        #[clap(long, default_value_t = 0, value_parser = parse_start_step, allow_negative_numbers = true)]
+        #[clap(long, value_parser = parse_start_step, allow_negative_numbers = true)]
         start_step: i64,
         /// Max number of processes to profile.
         #[clap(long, default_value_t = 3)]