The invention discloses a wireless laser lofting device used in tunnel which is composed of the computer, the servo electrical total station, the semiconductor laser and the wireless communication processor. The computer serial port is connected with the wireless communicator; the total station is connected with the wireless communicator by the serial port; the semiconductor laser is installed inthe ranging turn part of the total station. The system can locate and input the tunnel axis line data, the digging cross-section and the drilling scheme data controlled by the computer software; alsoit can measure the cross section and loft in the cross section outline, the cannon hole location. The device can deal the random curve tunnel, the cross section form and the drill scheme to monitor the digging by the laser. So it is proper for every underground project including the tunnel.