PSA is called prostate-specific antigen, which is a tumor-specific indicator of the prostate, and a PSA indicator of 0ng/ml 3 years after prostatectomy is normal, indicating good control of the disease. PSA is secreted by prostate follicular epithelium and ductal epithelium, and can be used for review and follow-up after radical prostatectomy. Generally after radical prostate cancer surgery, the entire prostate gland is taken out, so the serum prostate-specific antigen level will drop to a very low level. The optimal PSA value three years after prostate cancer surgery should be less than 0.2ng/mL. clinically, it is considered that the lower the PSA value after radical prostatectomy, the better, theoretically the best to reach 0ng/ml, but the minimum value of the test in each hospital varies, so it is normal to have a PSA of 0ng/ ml three years after surgery. After prostatectomy, it is recommended to review the PSA annually. If the PSA value is significantly elevated in the review result, it is recommended to consult a doctor in time for a clear examination and treatment under the doctor’s guidance.