Basal cell carcinoma is the most common malignant tumor of the skin, mostly seen in the elderly. Its occurrence is closely related to sunlight exposure, so it usually occurs in exposed areas, such as head, face, neck and back of hands, especially in the more prominent parts of the face. Basal cell carcinoma begins as a small skin-colored to dark brown infiltrated nodule, more typically a waxy, translucent nodule with a raised, curled edge. The central necrosis begins to break down and form black necrotic scabs, and the central necrosis spreads to deeper tissues, showing large patches of invasive necrosis that can reach deep into soft tissue and bone tissue. Basal cell carcinoma is mainly local infiltrative growth, and the possibility of distant metastasis is low. Pathological examination is required to confirm the diagnosis of basal cell carcinoma. Histopathology shows fused pulpy masses of basal cells in the epidermis with fenestrated edges and may have keratinous cysts. This disease should be differentiated from pigmented nevus, seborrheic keratosis, keratoacanthoma, squamous cell carcinoma and melanoma. Treatment methods for basal cell carcinoma include surgery, radiotherapy and freezing, etc. Surgery is the main treatment, and enlarged excision of lesions can achieve the purpose of radical treatment. Smaller lesions can be repaired by local flaps after resection, while larger lesions need to be repaired by skin grafting. For basal cell carcinoma of face, flap repair is preferred after surgical excision, which can achieve good cosmetic effect after surgery and avoid the regret of “patching” with skin implant.