Coating machine

The utility model discloses a coating machine which comprises a machine frame, and a left installation seat and a right installation seat are arranged on the left side and the right side of the upper portion of the machine frame respectively. The adjusting mechanism is used for adjusting the left mounting base and the right mounting base to move left and right, the left mounting base and the right mounting base are oppositely provided with right rotatable clamping heads, the opposite ends of the clamping heads are provided with inserting grooves, and the clamping heads are provided with a plurality of openings in the side walls of the inserting grooves in the circumferential direction; a plurality of grooves corresponding to the openings in a one-to-one mode are formed in the two ends of the traction rod in the circumferential direction, springs and locking blocks are arranged in the grooves, one ends of the springs are fixed to the bottom walls of the grooves, the other ends of the springs are connected with