The invention discloses an automatic locking rod bolt for a moving door. The automatic locking rod bolt comprises a door frame body and a moving door body. A movable area is arranged in the door framebody. Upper guiding grooves are formed in the top end wall of the movable area in a front-back-symmetry manner. Lower guiding grooves are formed in the bottom end wall of the movable area in a front-back-symmetry manner. The moving door body is connected between the upper guiding grooves and the lower guiding grooves in a sliding fit manner. A first sliding cavity is formed in the moving door body. The parts, on the left side and the right side of the first sliding cavity, of the moving door body are internally symmetrically provided with upward-extending rod bolt sliding cavities. The tail ends of the tops of the rod bolt sliding cavities penetrate through the top end face of the moving door body. The rod bolt sliding cavities are internally connected with rod bolt sliding blocks in a sliding fit manner. Through sliding grooves are formed in the rod bolt sliding blocks. The interiors of the through sliding grooves are connected with guiding sliding blocks in a sliding fit manner, wherein the guiding sliding blocks are fixedly matched and connected with the inner end walls of the rod bolt sliding cavities, and the parts, on the lower sides of the guiding sliding blocks, of the through sliding grooves are connected with jacking springs in a jacking fit manner.