Compressiontorque coupling is the most important component of two dimensional (2D) electrohydraulic proportional valve. Aim at the phenomenon of limited thrust of the proportional electromagnet, the high pressure and high flow controlling can not be realized to the traditional directacting electrohydraulic proportional valve. On the basis of ensuring the simple structure of the direct acting valve, a flexible springcompression coupling was designed. It was controlled by its own materials and geometric deformation. The linear thrust of proportional solenoid was changed into the torque of spool.The simulation of ANSYS software was carried out. The result shows that the torque of output can be 2 N·m at 80 N and 2 mm of the input of proportional solenoid. In the absence of friction, it achieves the amplification of the force.The simulation results has a certain theoretical reference value to optimizing its structure.