The invention discloses a double-acting variable vane pump. The double-acting variable vane pump comprises a housing, rotors and vanes, the rotors are located in the center and covered with the housing, a lap of ring K1 extends from the middle center position of the inner side wall of the shell housing extends to a lap of ring K1 in to the direction of the spherical center, three or more left locating grooves and right locating grooves are evenly formed in the inner sidewall of the housing in the circumferential direction, and the left locating grooves and the right locating grooves are both provided with the vanes; a circular groove is formed in the middle center position of the side wall of the each rotors, left sliding grooves are formed in the left side surfaces of the circular grooves, right sliding grooves are formed in the right side surfaces of the circular grooves, the vanes on the left locating grooves are further arranged on the left sliding grooves in a sliding mode, and the vanes on the right locating grooves are further arranged on the right sliding grooves in a sliding mode; the ring K1 is clamped between the vanes of the left locating grooves and the vanes of the right locating grooves, a chamber is formed among every two adjacent vanes, the surfaces of the circular grooves, the inner wall of the housing and the side wall of the ring K1 form a chamber, and the axis of the rotors and the axis of the housing do not coincide are in misalignment position. The relative linear velocity between the vanes and the housing is zero, and the double-acting variable vanepump is capable of working in at an extremely high velocity.