The axial piston pump is a swash plate type axial piston pump that uses an oil distribution plate for oil distribution, with the cylinder rotating and the variable flow controlled by a variable head. This pump adopts the design of the optimal oil film thickness for hydraulic static balance, enabling the cylinder and the oil distribution plate, as well as the sliding shoe and the variable head, to operate under pure liquid friction. It features a simple structure, small size, low noise, high efficiency, long service life and self-priming ability. Axial piston pumps have a variety of variable forms to meet the requirements of users. They are widely used in machine tool forging, metallurgy, engineering, mining, shipping and other mechanical and hydraulic transmission systems.