A gantry is disclosed. The gantry includes parallel door frames. Hanging beams perpendicular to cross beams are disposed between the door frames. The door frames include an upper door frame and a lower door frame. Cross bars forming a rectangular frame are formed between door pillars of the lower door frame. The gantry adopts a split type structure, and most bars are connected detachably, thus facilitating on-site installation and replacement of worn bars and increasing the working efficiency.