The utility model provides a quick mechanical switch, move the return circuit including main switch return circuit and behaviour, two return circuits are connected with insulating pull rod, the main switch return circuit includes static contact and moving contact, behaviour moves the return circuit and includes magnetic repulsion operating mechanism and coil spring bistable maintain the body, and the magnetic repulsion operating mechanism includes seal chamber, separating brake coil, closing coils, transmission pull rod and metal disc, the metal disc sets up inside seal chamber with transmission pull rod fixed connection. This fast switch cushions it when the switch carries out branch closing operation through magnetic repulsion, avoids mechanical shock.