International Union Against Cancer has found after clinical investigation that those who have sex after tumor patients’ treatment have lower tumor recurrence rate than those who have no sex. The length of survival of tumor patients, besides factors such as drug or surgical treatment, largely depends on the confidence and courage of the patients themselves to survive, and that needs to get the comfort and caress between husband and wife. Keeping a normal sex life between husband and wife can often make the patients get the joy of life from it and full of love for life, thus can prolong life. How to master the degree of sexual life of tumor patients depends on the condition, age, physical strength, mental state and nutritional status. Except for the period of surgery, radiotherapy or chemotherapy, tumor patients should suspend sex life when their physical condition is not good, but in the recovery period, as long as they have spontaneous sexual desire, they can have proper sex life. As for the degree of sexual life, the patient should master not to feel backache, dizziness, fatigue is appropriate. The patient’s spouse should correctly understand the connotation of sexual life, so that it can be truly comfortable and comfortable, the pain can be relieved in the pleasure and the tension can be relieved. Research shows that appropriate sex life for patients recovering from cancer is not only harmless to the body, but also can invigorate the spirit and regain the courage to live, which can promote the treatment and recovery of patients. Since cancer is not transmitted through sexual life, therefore, spouses should not have any doubts and worries about transmission, but should accept sexual life happily, so that patients can have a happy heart and be conducive to recovery. Erectile dysfunction (ED) is one of the most important causes of sexual disharmony in couples. For male tumor patients, it is mainly caused by surgery, radiotherapy and chemotherapy, such as prostate cancer, bladder cancer, ED caused by surgery or radiation therapy for rectal cancer, the incidence can be 30 to 100%. The restoration of normal erectile function in male oncology patients has become one of the most important goals of oncology treatment.