With the development and combination of a series of new technologies such as stereotactic technology, imaging technology and computer technology, cancer is no longer a terminal disease that used to be “talked about cancer”. Modern radiotherapy can precisely hit the target, selective radiotherapy or local spot removal for the whole body lesions; for some early stage tumors, it can achieve the same effect as surgical resection, or even better and less traumatic. With the improvement of living standard, high protein and high fat intake, the resolution of prostate cancer is increasing year by year. At present, there are many ways to treat this disease, such as radical resection, endocrine therapy, orchiectomy depot treatment, etc. In recent years, modern radiotherapy has been used to treat prostate cancer, which has achieved very good results and less damage.