The invention discloses a two-side driving balance type low-speed large-torque axial plunger motor which comprises a transmission shaft, wherein a motor shell consists of a front shell and a rear shell; an oil inlet and an oil outlet are formed in the motor shell; a flow distribution disk, a cylinder body and an inclined disk are arranged in the motor shell; one end of the transmission shaft penetrates through the front shell and the flow distribution disk and is connected with the cylinder body in a transmission manner; a plurality of external discharging plunger holes are formed in the cylinder body and are arrayed in the circumferential direction of the cylinder body; external discharging springs and external discharging plungers are arranged in the external discharging plunger holes; one end of each external discharging spring is connected with the bottom end of the corresponding external discharging plunger, and the other end of each external discharging spring is connected with the inner wall of the corresponding external discharging plunger hole; the top ends of the external discharging plungers are in contact with the surface of the inclined disk through external discharging sliding shoes; first waist-shaped oil window holes corresponding to the external discharging plunger holes are formed in the flow distribution disk. The two-side driving balance type low-speed large-torque axial plunger motor is steady during starting; under low speed and large torque, the phenomena of creeping, shaking and the like can be avoided.