Valve Plate Double-Side Lapping Machine adopts double-plate synchronous counter-lapping structure. It can complete simultaneous lapping of both sides of workpieces in one clamping, and the material removal rate of two sides is synchronously controllable. Equipped with closed-loop pressure regulation and precision planetary transmission mechanism, the machine plate runs stably to ensure uniform lapping across the whole surface of valve plates. It can precisely control flatness, parallelism and thickness tolerance with stable surface finish after machining. It eliminates positioning deviation and stress deformation caused by repeated turnover in single-side processing. Compatible with various valve plate substrates such as metal and cemented carbide. Lapping parameters can be set digitally for easy switching between sample trial production and mass manufacturing. The machining process reduces manual intervention, avoids dimensional dispersion caused by multiple clamping operations, ensures the consistency of sealing surfaces for the whole batch of valve plates, lowers assembly leakage risks, and meets precision manufacturing requirements of hydraulic, pneumatic and compressor valve plates.