The utility model discloses an insulating hanging hook for fixing a double bundle conductor yoke plate of overhead transmission lines, comprising an insulating operation rod and a fixing nut, wherein the upper end of the insulating operation rod is fixedly connected with the fixing nut through screw threads; characterized in that the lower end of the insulating operation rod is fixedly connected with the long end socket of a U-shaped hanging hook, a horizontal segment for fixing a right-angle hanging hook is arranged on the upper end of the insulating operation rod through a fixing nut clamping and fixing sleeve, and the upper end of the insulating operation rod at the upper portion of the fixing nut is provided with a cavel nut. The insulating hanging hook for fixing a double bundle conductor yoke plate of overhead transmission lines is simple in structure, low in cost and easy in mounting, and can effectively fix the yoke plate and keep the yoke plate not to tilt when a double bundle conductor linear rod composite insulator string in 220KV power transmission lines is replaced in a live manner, thereby enabling the on-rod electrician to smoothly connect a socket with an insulator, ensuring the work to be smoothly and safely accomplished, shortening the power failure time and ensuring the economic benefit of enterprises.