Reinforcing and supporting device for constructional engineering

The utility model relates to a reinforcing and supporting device for constructional engineering. The reinforcing and supporting device comprises a base, a lifting mechanism arranged on the base, a supporting plate arranged on the lifting mechanism and a fixing mechanism. The supporting plate is connected with the lifting mechanism which drives the supporting plate to ascend and descend. The fixing mechanism comprises four fixing assemblies, and the four fixing assemblies are evenly arranged on the periphery of the base. Each fixing assembly comprises a fixing cavity, a screw rod, a connecting plate, a fixing foot and a first power mechanism; the fixed cavity is arranged on the base, and a vertical screw rod is arranged in the fixed cavity; a horizontal connecting plate is further arranged in the fixing cavity, the edge of the connecting plate makes contact with the inner wall of the fixing cavity, a first through hole allowing the screw to penetrate through is formed in the middle of the connecting plate, and