Working roll changing aid

The utility model discloses a working roll changing aid comprising a first changing rail and a second changing rail. The working roll changing aid further comprises a changing auxiliary abutting device which has an abutting face on the side close to the first changing rail. When a working roll is abutted to the abutting face of the changing auxiliary abutting device, a first guide wheel below the working roll is disposed on the first changing rail, and a second guide wheel below the working roll is disposed on the second changing rail. When the working roll is lowered for changing, the fact that one side of the working roll abuts to the abutting face of the changing auxiliary abutting device is ensured; under guidance of the changing auxiliary abutting device, the first guide wheel below the working roll is exactly placed on the first changing rail, and the second guide wheel below the working roll is exactly placed on the second changing rail. By the aid of the changing auxiliary abutting device, manual alig