Aiming at the rapid leveling requirement after the system damage of vehicle-borne radar servo, a portable accurate leveling system of vehicle-borne radar is designed. The four-station hydraulic system is used as the bearing structure, the electromagnetic reversing valve is controlled using the PLC-based fuzzy PID algorithm and the self-sealing quick live connection hydraulic cylinder is used to realize the rapid lifting of the on-board platform leveling system. Meanwhile, the double-precision inclination sensor is used to feedback the platform precision of X-Y axis, and the fine-tuning precision of the hydraulic cylinder is controlled through the electric in/out control valve beside the cylinder block, so as to realize the accurate leveling of the vehicle-mounted radar. In addition, the pressure sensor is used to judge the “virtual legs” to improve the response speed and stability of the four-points support system. The test results prove that the system has the advantages of strong anti-interference ability, fast lifting and leveling speed, high stability and high precision, which meets the requirements of rapid deployment in wartime.