Hi @suitangxiaoyi,
As @VMartini mentioned, one of the things that can cause compass calibration to fail is to incorrectly specify the autopilot orientation for the calibration. Attempting to calibrate near a large magnetic object (e.g. on a metal table, near high voltage wiring, or in a steel building) can also cause calibration issues.
If that is not the cause then your compass may be faulty, in which case I would recommend contacting support@bluerobotics.com to describe the problem, what you’ve tried, and your order number (/rough order date), after which the issue can be resolved as appropriate 