The invention relates to an electromagnetic direct-drive linear hydraulic pump based on dissymmetric-flow-pass heat dissipation. The pump comprises a linear actuator rotor, linear actuator stators, anend cover, a hydraulic cylinder block, a piston, an air inlet flow pass, an exhaust flow pass, a valve body and a one-way valve. The pump is characterized in that the linear actuator rotor is integrated with the piston of the hydraulic piston to serve as a rotor, and an inner chamber of the hydraulic pump is divided into a pump liquid chamber Q and a pump air chamber A; the linear actuator outerstator and the linear actuator inner stator are axially fixed through the end cover, an air gap is formed between the linear actuator outer stator and the linear actuator inner stator, and the linearactuator outer stator is fixedly connected with the hydraulic cylinder block, fixedly connected with the valve body, to serve as a stator; the pump air chamber A communicates with the environment through the air gap, the air inlet flow pass and the exhaust flow pass respectively, and the axial section of each flow pass is trapezoid; and the linear actuator rotor directly drives the piston to moveback and forth, and is used in cooperation with the air inlet flow pass and the exhaust flow pass to carry out pump suction of air in the pump air chamber to carry out air cooling heat dissipation onthe interior of the linear actuator. With the electromagnetic direct-drive linear hydraulic pump based on dissymmetric-flow-pass heat dissipation, the problems that an electromagnetic direct-drive linear hydraulic pump emits much heat, and particularly, the heat inside is difficult to emit are solved.