Abstract: The utility model discloses a pneumatic automatic reversing feeding pump, which belongs to the technical field of pneumatic pumps, and it comprises a pneumatic part, a connecting part, and a pumping part. The pneumatic part adopts the design structure of a square cylinder; the design structure of a square integrated reversing valve and valve plate; the spherical piston rod connection structure; the pneumatic part and the hydraulic part are easy to install and dismantle with the clamp design structure. The hydraulic part includes a bung adapter assembly, a pump body, a up suction tube, a lower suction tube, an intake valve, and other related parts.