The utility model provides a two cluster insulator U -shaped screw linkage of modified, includes the U -shaped channel -section steel, hangs the screw, U -shaped channel -section steel and yoke plateconnection screw, four hole yoke plates, its characterized in that: U -shaped channel -section steel top has two to hang the screw, and two pitch -rows that hang the screw are 80cm, and the U -shapedchannel -section steel hangs the screw through two to be connected with the shaft tower, and respectively there are two yoke plate connecting holes U -shaped channel -section steel both sides, have two upper and lower rounds on the four hole yoke plates, the row of going up has two to go up the hole, wears yoke plate connection screw after two upward the hole is aimed at with the yoke plate connecting hole of U -shaped channel -section steel and is connected, lower row of four hole yoke plates have two lower holes, and two lower holes are passed through screw, right angle hanging plate, bulb ring and are connected with two strings of insulators, the beneficial effects are that: with U -shaped screw and yoke plate only one single string be connected and had improved fail safe nature for twoyoke plate connection screw connect.