The invention is mainly applied to the field of cable trench inspection of a substation and a power generation plant, and in particular relates to an inspection tool preventing small animals of a cable trench. The inspection tool comprises a tool box and a camera, wherein the camera is provided with an LED lighting lamp and is arranged at an end of a telescopic snake-shaped metal pipe, a handle is arranged is arranged at the other end of the snake-shaped metal pipe, the camera and a wire of a display device are arranged in the snake-shaped metal pipe, a USB interface is arranged at a tail end of the wire and is connected with the display device, the tool box comprises a box cover and a box body, a handle placing groove is formed in one side of the box body, a rotation shaft is arranged at a central position of the box body, and an arc limiting groove is formed in an outer side of the rotation shaft. The inspection tool is simple and reasonable in structure and accurate in inspection, and is convenient to operate, the inspection efficiency can be improved, the inspection safety can also be improved, and the labor intensity is reduced.