The invention relates to a combined operating rod for a back-up protection device for replacing a strain insulator string. The combined operating rod comprises a first operating rod with a first hook head and a second operating rod with a second hook head; the back end of the second operating rod is hinged to the back side part of the first operating rod and can swing up and down relative to the first operating rod; the second operating rod can stretch longitudinally along the axis. The combined operating rod is easy and convenient to use and easy to operate, and the working performance and the operating safety are improved.