Expansion joint protection device for constructional engineering

The utility model discloses an expansion joint protection device for constructional engineering, which comprises a buffer layer, a top cover, a wall plate, a mounting pipe, an expansion link, a bufferspring and a compression spring, the top cover covers the top of an expansion joint, the buffer layer is arranged between concrete on two sides of the expansion joint and the top cover, and the wallplate is arranged in the expansion joint. The two sides of the wall plate are connected with the buffer layers at the tops of the two pieces of concrete respectively, a cavity is formed in the wall plate, the mounting pipe is arranged at the bottom of the cavity, a buffer spring is arranged in the mounting pipe, a sliding block is arranged at the top of the buffer spring, the top end of the telescopic rod is connected with the bottom of the top cover, and the bottom end of the telescopic rod extends into the mounting pipe to be connected with the sliding block; compression springs are arrangedbetween the two side walls