diff --git a/nemu/src/monitor/sdb/sdb.c b/nemu/src/monitor/sdb/sdb.c
index 2610f4a..2c9842b 100644
--- a/nemu/src/monitor/sdb/sdb.c
+++ b/nemu/src/monitor/sdb/sdb.c
@@ -171,7 +171,8 @@ static int cmd_help(char *args) {
           printf("-- %s\n", cmd_table[i].description);
           // Print available subcommands
           for (int j = 0; j < cmd_table[i].nr_subcommand; j++) {
-            
+            struct CMDTable *sub_cmd_table = cmd_table[i].subcommand;
+            printf("\t %s -- %s", sub_cmd_table[j].name, sub_cmd_table[j].description);
           }
         }
         return 0;