Contact system of disconnecting switch

The utility model discloses a contact system of an isolating switch. The contact system comprises a moving contact, a positioning shaft, a contact supporting piece, a static contact, a spring, a base and an upper cover, the base is provided with a spring positioning column, the spring positioning column is provided with a spring positioning hole, the bottom end of the spring sleeves the periphery of the spring positioning column and is fixedly connected with the base, the moving contact is fixed on the contact supporting piece, and the top end of the spring abuts against the lower surface of the moving contact; the top end of the positioning shaft is fixedly connected with the moving contact, and the bottom end of the positioning shaft correspondingly extends into the spring; the upper cover is correspondingly buckled above the base, two static contacts which are parallel to the moving contact and are positioned above the moving contact are clamped and fixed between the upper cover and the base, and the movin