Surface treatment equipment for enhancing connecting strength of inner plate and outer plate of tail door and method

The invention discloses surface treatment equipment for enhancing the connecting strength of an inner plate and an outer plate of a tail door and a method. The surface treatment equipment comprises a mounting part capable of moving in the X direction and/or the Y direction, flame surface treatment equipment, ultrasonic impact equipment and a bracket for placing the inner plate and/or the outer plate. The flame surface treatment equipment and the ultrasonic impact equipment are respectively arranged on the mounting part up and down, a fire-jet head of the flame surface treatment equipment and an impact head of the ultrasonic impact equipment are respectively oppositely arranged up and down, and the bracket is arranged between the fire-jet head and the impact head; and gaps are formed between the upper end of the bracket and the fire-jet head and between the lower end of the bracket and the impact head respectively, the fire-jet head is configured to conduct fire-jet treatment on the upper surface of the inner