The invention relates to a bidirectional sliding valve type electro-hydraulic proportional pressure reducing valve and relates to the field of hydraulic control valves. The proportional pressure reducing valve comprises a valve body, a valve element, two throttling pistons, two reset springs, voice coil motors and a baffle. When the voice coil motor on one side works, the piston on the same side is driven to move axially, thus, the valve element is driven to move axially, hydraulic oil flows into a valve cavity, pressure is generated on the surface of the valve element and forms force balancewith spring force and motor driving forces, when the motor driving forces are different, required oil pressures are different, and thus the pressure of a working oil path on the corresponding side iscontrolled. Due to the fact that driving force of the voice coil motors is related to current, stepless regulation of the driving force can be achieved, and the continuous and stepless oil pressures of the working oil paths can be obtained. The proportional pressure reducing valve can achieve operate bidirectionally, is high in system stability, simple in structure design, easy to machine, low inmanufacturing cost and high in adaptability, and the working flow can be changed by changing sizes.