The utility model relates to an automatic nailing device, be applicable to self -adhesion cloth or prevent / drain bar is fixed to the tunnel internal surface, its characterized in that, include: the walking track, it sets up along the tunnel internal surface along an orbit setting, this orbit, walking unit, it sets up walking pathway movement can follow on the walking track, the power actuated setting device, it sets up a serial communication port, the utility model discloses during the use, through setting up the walking track along the tunnel internal surface, when making walking unit along walking pathway movement, along the orbit removal of tunnel internal surface to make the power actuated setting device correspond with the tunnel internal surface all the time, walking unit drives the power actuated setting device and moves the in -process, and power actuated setting device preventing on to the route / drain bar is fixed, and above -mentioned automatic nailing device need not manual operation, and manual operation's mode is compared to the degree of automation height, and work efficiency improves greatly.