The invention provides a tool for carrying out live-line installation and dismounting on a solar luminescent caution board. With the too, problems of live-line installation and dismounting of a solar luminescent caution board with characteristics of live-line installation and dismounting that is applied by the inventor can be solved. The tool comprises a shell, hook brackets, hooks, side baffle plates, positioning grooves, supporting springs and an insulating operation rod. The shell has a U-shaped structure. Two groups of hook brackets are arranged; the two hook brackets in each group are respectively arranged at the two sides of the shell; and the hooks are hinged to the hook brackets. The two side baffle plates are arranged in notches of the shell; and the positioning grooves are formed in the inner sides of the side baffle plates. The support springs are arranged at the bottom of the U-shaped opening of the shell; a support post is arranged below the shell; and the insulating operation rod and the lower part of the support post are connected fixedly. According to the invention, the structure is simple and the operation is convenient. And the solar luminescent caution board with characteristics of live-line installation and dismounting can be installed or dismounted rapidly under the circumstances that no power interruption needs to be carried out, wherein the solar luminescent caution board with characteristics of live-line installation and dismounting is invented by the inventor.