The invention discloses a multifunctional medical 
shoulder joint dislocation preventing device. The multifunctional medical 
shoulder joint dislocation preventing device comprises an 
upper limb supporting member, an air bag and an attachment strap, wherein the 
upper limb supporting member and the air bag are connected together by the attachment strap, the 
upper limb supporting member comprises a 
forearm supporting pocket and a fixing sleeve, a 
forearm of a sufferer is fixed by the fixing sleeve, a glove for avoiding buckling of a palm, a second tightening strap and a first tightening strap forfixing an 
elbow joint are arranged in the 
forearm supporting pocket, the second tightening strap and a 
shoulder joint lifting strap perform lifting in a matched manner to strengthen external fixationof a shoulder joint and avoid 
dislocation of the shoulder joint, and the air bag is arranged at a position, located at margo vertebralis of a shoulder blade of the sufferer, of the attachment strap. The device has a supporting action on an upper limb of an affected side of the sufferer so as to correct the dislocation of the shoulder joint; meanwhile, a hand of the affected side is fixed to a 
neutral position through the glove, the fixing sleeve and the first tightening strap, the forearm of the affected side is fixed in a horizontal direction, a hand and a 
wrist are prevented from buckling, awrist joint, metacarpophalangeal joints, interphalangeal joints and the like are prevented from 
contracture malformation; and the air bag assists serratus anterior muscles and trapezius muscles to contract after inflation, so that the shoulder blade can be attached to a chest and is fixed, and a winged shoulder is avoided.