Supporting frame convenient to adjust horizontal angle and used for constructional engineering

The utility model discloses a constructional engineering support frame convenient to adjust horizontal angle, which comprises a bottom plate, a mounting plate and a support frame, and further comprises a servo motor and a fixing block, the servo motor is mounted on the surface of one side of the bottom plate, the power output end of the servo motor penetrates into the bottom plate and then is connected with the power input end of a first screw rod, and the power input end of the first screw rod is connected with the fixing block. One end of the first lead screw is fixedly connected with a second lead screw movably connected with one side of the inner wall of the bottom plate, the first lead screw is in threaded connection with a sliding block A, the second lead screw is in threaded connection with a sliding block B, the sliding block A is movably connected with a connecting rod A, and the top of the sliding block B is connected with a connecting rod B in a matched mode. And a sliding rail is constructed on th