The utility model belongs to the technical field of the electrical equipment technique of maintaining and specifically relates to a 750kV circuit block of four strain insulator string tip fixture is related to. The utility model discloses a 750kV circuit block of four strain insulator tip card, articulate at two shrink subassemblies at 750kV circuit block of four strain insulator tip card both ends respectively and articulate another the 750kV circuit block of four strain insulator tip cards at the other end of two shrink subassemblies. The utility model discloses fixture simple structure, convenient operation, swift, the efficiency of construction is high, no matter be to the change of whole string of insulator still to the wherein change of arbitrary a slice insulator, can both get to swift, convenience, efficient effect.