The invention provides a compressor pump structure and a rotary compressor. The compressor pump structure comprises a first flange with a first concentric through hole, a first cylinder body with a second concentric through hole, a partition plate with a third concentric through hole, and a second cylinder body with a concentric thread hole, wherein a concentric screw sequentially penetrates through the first concentric through hole, the second concentric through hole and the third concentric through hole and is bolted with the concentric thread hole, so that the first flange, the first cylinder block, the partition plate and the second cylinder body are integrally formed, and the apertures of the first concentric through hole, the second concentric through hole, the third concentric through hole and the concentric thread hole are sequentially reduced. According to the compressor body structure and the rotary compressor disclosed by the invention, the corresponding aperture of an assembly hole of the concentric screw is sequentially reduced along the direction of the screw head to the thread part of the concentric screw to reduce the assembly clearance of a pump body, therefore, the sealing distances among pump parts can be increased to reduce the leakage of a refrigerant into the assembly hole, so as to improve performances and reliability of the compressor, and prevent the pump body from being assembled abnormally.