The present invention relates to the technical field of formwork reinforcement equipment, in particular to a formwork reinforcement device for construction, which includes a base, a front base and a rear base, the top of the rear base is provided with a rear pressure plate, and the top of the front base is provided with a front pressure plate. Bearing sleeves are fixedly installed at both ends of one side of the front side pressing plate, first threaded sleeves are fixedly installed inside the bearing sleeves, and first toothed discs are fixedly installed outside the first threaded sleeves on both sides, by setting the rear side pressing plate, front The side pressure plate, the bearing sleeve, the first threaded sleeve, the first screw, the first toothed plate, the first shaft, the second toothed plate, the third toothed plate, the second rotating shaft, the fourth toothed plate, and the handle cooperate with each other. The rotation speed of the first threaded sleeve is the same during the rotation process, the direction of rotation is consistent, and the internal formwork is evenly stressed, avoiding problems such as slurry leakage, mold runout, and mold explosion due to large errors in artificial assembly and splicing of reinforcement plates.