The invention relates to the technical field of rope ladder fixing devices, more particularly, relates to a device for fixing a rope ladder in electric transmission line hot-line work. The device consists of a stand 1, a screw tightening device 2, and a rope ladder connecting assembly 3; the screw tightening device 2 is connected to the stand 1 via a thread; the screw tightening device 2 is buckled with the rope ladder connecting assembly 3 via a connecting buckle 14. The device for fixing the rope ladder in the electric transmission line hot-line work provided by the invention has the beneficial effects that (1) the device is light and handy and flexible, easy to carry, has a simple structure, is easy to use, and increases working efficiency of staff; (2) during working, the stand can be easily and fast fixed on the ground by rotating stand legs, and the device can also be adapted to the ground with hard soil texture, thereby reducing the number of the staff and improving the working efficiency; and (3) uptight degree of the rope ladder can be adjusted, and the device is easy, fast and efficient to use.