Objective To Study the availability of manual reduction and the method of internal fixation in the treatment of anterior shoulder joint dislocation and proximal humeral fracture by percutaneous internal fixation. Methods To measure the force that pull tail-pressed angle-adjusted hollow screw out of the head of humerus (P(subscript min)) and the force that needed in the traction reduction of acute anterior dislocation of shoulder joint under local anesthesia (P(subscript max)). Stastical analysis has been made. Results When the screw put into the head of humerus 20 mm, P(subscript minA)=284 N, P(subscript minB)=l98 N; P(subscript maxA)=206 N, P(subscript maxB)=195 N. The act of comparing P (subscript min) with P(subscript max), P(subscript min) is more than P(subscript max) Traction force that needed by traction reduction of anterior dislocation of shoulder joint is less than the minimum force that pull tail-pressed angle-adjusted hollow screw out of humeral head. Conclusion Using tail-pressed angle-adjusted hollow screw can meet the need of percutaneous internal fixation in the treatment of proximal humeral fracture and anterior dislocation of shoulder joint.