The invention relates to a novel light box hanging device which comprises a frame and a bed frame. The frame comprises an upper transverse rod, a lower transverse rod and vertical rods for connecting the upper transverse rod with the lower transverse rod; holes are formed in the joining positions of the upper transverse rod and the vertical rods and the joining positions of the lower transverse rod and the vertical rods, pad feet are arranged at the positions, located on the front end faces of the holes, of the upper transverse rod and the lower transverse rod, and tooth-shaped strips are further arranged on the lower end face of the upper transverse rod; an upper connecting groove and a lower connecting groove which expand left and right are formed in the upper end and the lower end of the bed frame, clamping protruding heads are arranged on the front end faces of the upper connecting groove and the lower connecting groove, a groove is formed in the middle point of the bed frame, and an elastic locking device is arranged at the position, located below the upper connecting groove, in the bed frame.