Osteochondroma can be treated in the following two cases: First, solitary osteochondroma, asymptomatic, can be operated without surgery, but should be closely observed. Those who meet the indications for surgery, such as tumor is large and affects the appearance; tumor has compression symptoms on adjacent tissues; tumor is located in medial bone, such as pelvis, spine and scapula; tumor has malignant tendency; prevention and correction of deformity, should undergo surgery. Surgery should be done to remove the whole piece from the normal bone edge around the base of the tumor, including its periosteum, cartilage cap and bony part. If the cartilage cap is not completely excised, it is easy to recur. In case of malignant transformation, extensive resection should be performed as low-grade malignant tumor. Second, multiple osteochondromas, asymptomatic ones do not need surgery, but should be closely observed. Those with pain and dysfunction can be surgically resected locally, and those with malignant changes need to undergo extended resection.