Based on CT picture,the geometrical dimensions of humerus were obtained.A three-dimensional finite element model was established on the basis of three-dimensional reconstruction.At three different angles30°,45°,90°,with fracture,the force along the axis of the humerus was calculated by using ANSYS5.6and stress distribution was gained.We acquire some information according to the results.The information may offer a theoretical foun-dation for the treatment of humeral fracture.