diff --git a/os/src/config.rs b/os/src/config.rs
index 113a3509..2fea79d3 100644
--- a/os/src/config.rs
+++ b/os/src/config.rs
@@ -15,7 +15,7 @@ pub fn kernel_stack_position(app_id: usize) -> (usize, usize) {
 }
 
 #[cfg(feature = "board_k210")]
-pub const CLOCK_FREQ: usize = 10000000;
+pub const CLOCK_FREQ: usize = 403000000 / 62;
 
 #[cfg(feature = "board_qemu")]
 pub const CLOCK_FREQ: usize = 12500000;
\ No newline at end of file