Objective To compare the therapeutic outcomes of lateral locking plate combined with anterior medial support plate, locking plate combined with autogenous iliac bone graft, and simple lateral locking plate in the reconstruction of medial column support loss in elderly patients with proximal humeral fractures. Methods A retrospective cohort study was conducted to analyze the data of 51 elderly patients with proximal humeral fractures who were admitted to the Orthopedics Department of Zhongshan Ho