Guide rail sliding block machining system and machining method thereof

The guide rail sliding block machining system comprises a numerical control grinding machine and a power-assisted manipulator, the power-assisted manipulator faces a magnetic adsorption working platform, and the tail end of the power-assisted manipulator is connected with a clamping tool; the clamping tool comprises a force bearing plate, a side plate, an electromagnet and a connecting block, the connecting block is detachably connected between the tail end of the manipulator and the force bearing plate, through holes are continuously formed in the force bearing plate, each through hole is provided with a guide bolt, and a fixing plate fixedly connected with the force bearing plate is arranged on the upper side of each through hole; the guide bolt is in threaded connection with the fixing plate, side plates are symmetrically arranged on the two sides of the bottom of the force bearing plate, the bottom of each side plate is provided with a concave boss, fixing blocks corresponding to the through holes are arr