The invention discloses a 760kN disc-shaped insulator clamp which is characterized by comprising a front clamp body, a rear clamp body and two sets of power generation tension stringing devices. The two ends of each set of power generation tension stringing device are connected to the front clamp body and the rear clamp body respectively, and the front clamp body and the rear clamp body respectively comprise a clamp main body and a clamp upper cover hinged to the clamp main body. Each clamp main body and each clamp upper cover are clamped in a groove between a 760kN disc-shaped insulator steel cover and an insulating part. According to the 760kN disc-shaped insulator clamp, the difficult problem that a closed clamp for replacing a 760kN disc-shaped insulator at home and abroad does not exist at present is solved, and the capability of overhauling the large-tonnage disc-shaped insulator by electric transmission line operation and maintenance units, such as an extra-high voltage operation and maintenance unit, a multi-fission large-section conductor operation and maintenance unit and an extra-high voltage large-crossing operation and maintenance unit, is improved.