The utility model belongs to the technical field of tools and discloses a tool for adjusting concentricity of an electromotor and a pump. One end of a prying rod is a flat prying head; the other end of the prying rod is an external threaded rod; a screw adjusting device with an ejection rod and a screw adjusting device with a baffle board are installed on the external threaded rod; a rectangular prying plate is welded to a middle position of the external threaded rod; two nuts are welded to holes which are formed at corresponding positions inside two ends of a rectangular steel plate to form into the screw adjusting device with the ejection rod; one nut is installed on the internal side of the external threaded rod of the prying rod; a movable joint ejection rod is installed on the other nut; a 45-degree circular cone is arranged at the top of the movable joint ejection rod; a movable joint head of the movable joint ejection rod is provided with a movable handle; the screw adjusting device with the baffle board which is formed by a nut and the baffle board which is perpendicularly welded to the nut is installed on the external side of the external threaded rod of the prying rod.