Elbow joint brace with adjustable be used for after ulnar collateral ligament repair technique belongs to medical appliances technical field. The utility model provides a: including upper arm mount and forearm mount, characterized by is equipped with the cantilever crane lag outside the upper arm mount, and upper arm mount rear side is equipped with the flexible liner of upper arm, and the flexible liner of upper arm passes through upper arm pad adapter sleeve and the upper arm mount is connected, and upper arm pad adapter sleeve front side is equipped with the shutting of upper arm sleeve pipe and buckles, and upper arm flexibility liner inboard is equipped with the flexible isolating pad of upper arm. The utility model discloses simple structure, convenient to use have inboard supporting role when stretching the elbow, can protect the ulnar collateral ligament toe -in after restoreing, can effectively improve postoperative rehabilitation training effect.