Building engineering template fixing device

The utility model discloses a constructional engineering template fixing device which comprises a bottom plate, a frame plate is arranged above the bottom plate, the inner wall of the frame plate is fixedly connected with a stepping motor, the output end of the stepping motor is fixedly connected with a square plate, and the upper surface of the square plate is fixedly connected with two first telescopic rods. The telescopic ends of the two first telescopic rods are jointly and fixedly connected with a rectangular box, the front face of the rectangular box is fixedly connected with a supporting plate, an air extracting pump is arranged in the rectangular box, the input end of the air extracting pump fixedly communicates with an air outlet pipe, the output end of the air extracting pump fixedly communicates with an air extracting pipe, and the end, close to the supporting plate, of the air extracting pipe fixedly communicates with two suction cups. The upper surface of the bottom plate is fixedly connected wit