The utility model discloses a +/-500kV line triple tension string shielding ring and a connection plate. The shielding ring comprises a ring body, two brackets and two fasteners, wherein the ring body is the runway type, the two brackets are symmetrically distributed on the ring body, both ends of one bracket are fixedly connected with one side of the ring body, the two fasteners for connecting a tension string fitting are distributed on the tops of the two brackets, the two fasteners are rectangular blocks and through holes for bolt connection are formed on the fasteners, and the shielding ring is connected on the connection plate by the two fasteners. The shielding ring is mounted on the connection plate, thus the string type structure is optimized.