Radiotherapy treatment for early prostate (glandular) cancer is useful. Radiation therapy for early prostate cancer can be curative, with rates of local tumor control and 10-year disease-free survival similar to radical prostatectomy. Radiation therapy kills cancer cells with high-energy rays. It is slightly less likely to cause sexual dysfunction, urinary tract stenosis, and urinary incontinence than surgery. Although radiation therapy may cause radiation damage to the rectum, it is able to improve the quality of life of patients compared to the complications caused by surgery. Commonly used radiation therapy methods are external radiation therapy and brachytherapy. The specific choice of which treatment method needs to be decided according to the patient’s condition and his/her own situation. Prostate cancer patients should pay attention to keeping the skin clean and dry during radiation therapy, and if they find any breakage at the skin of the exposed area, they should let the doctor deal with it in time. Most of the early prostate cancer patients can be cured after treatment, so they should actively cooperate with doctors.