Basal cell carcinoma is the most common malignant tumor of the skin, accounting for about 80% of all skin malignancies. Its causes are related to sunlight exposure, long-term radiotherapy, long-term chronic ulcers that do not heal, frequent exposure to arsenic, tar and asphalt, and skin keratosis, which often causes cancer. Skin keratosis often causes cancer. It is mostly found on the head, neck and face, which are exposed to sunlight, reaching 92%. One of the characteristics of skin basal cell carcinoma is that metastasis rarely occurs. The cure rate of basal cell carcinoma is over 90% with correct and timely surgical treatment. Radiotherapy is more effective for basal cell carcinoma, but it is easy to cause hair loss, loss of sweat gland function, skin atrophy, dryness, scar or ulcer, etc. It is not advocated to be preferred for non-special parts and cases; systemic chemotherapy is not advocated without regional lymph nodes or distant metastasis, and there are other therapies such as topical fluorouracil ointment, intra-tumor injection of interferon, liquid nitrogen freezing, topical Chinese herbal ointment, etc. These therapies are not listed as the first line. These therapies are not listed as the first-line treatment, so patients should be careful when seeking medical consultation. Once skin cancer is suspected, patients should go to the hospital in time and receive scientific treatment according to the treatment standard of basal cell carcinoma. Currently, the best treatment option is surgical excision + post-operative photodynamic therapy. Next, we will show you some typical cases of skin basal cell carcinoma surgery, all patients received three times of standardized photodynamic therapy after surgery.