Coal mine underground crossheading forepoling supporting frame

The utility model relates to a coal mine underground crossheading forepoling supporting frame, which consists of a left frame body and a right frame body with the same structure, wherein each frame body consists of a front frame, a middle frame and a back frame which all consist of a top beam, a base and hydraulic upright posts; the middle frame is connected with the top beam between the front frame and the back frame and the base between the front frame and the back frame by using a hinged structure; the top beam and the base of the front frame are hinged with each other by using a hydraulic prop; the top beam and the base of the middle frame are hinged with each other by using a front hydraulic prop and a back hydraulic prop, and form a stabilizing mechanism by using a four bar mechanism; the top beam and the base of the back frame are hinged with each other by using a hydraulic prop; and finally, the left frame body and the right frame body are hinged into a whole by a hydraulic jack on the middle frame. T