Building assembly machining fixing device

The utility model discloses a fixing device for building assembly body machining. Bottom plate, wherein a side plate is fixedly mounted at the top of the bottom plate; a servo motor is fixedly mountedon the side wall of the side plate; the output end of the servo motor is fixedly connected with a ball screw; a guide rod is further arranged between the two side plates; and a moving block is in threaded connection with the ball screw, a hydraulic cylinder is fixedly mounted on the moving block, a mounting plate is fixedly connected to the top of the hydraulic cylinder, an electric push rod is fixedly connected to the side wall of the mounting plate, and the output end of the electric push rod is movably connected into a fixing sleeve in a sleeved mode and extends to the outside to be fixedly connected with a fixing lug. According to the utility model, through the movement of the clamping seat, the clamping plate is enabled to clamp a to-be-processed workpiece, so that the to-be-processed pipe fitting can be con