The utility model provides a tool bag for line inspection of overhead transmission lines, belongs to the technical field of special tools for line inspection of the overhead transmission lines, and aims to provide a damp-proof and waterproof tool bag for line inspection of the overhead transmission lines, which is convenient to take tools out. The tool bag adopts the technical scheme that a patch pocket is arranged on the front side of a bag body; two shoulder straps are arranged on the back side of the bag body; side pockets are arranged on two sides of the bag body; pockets for holding special tools for line inspection independently are arranged inside the bag body; a high-intensity wear-resistant rubber base is arranged at the bottom of the bag body; and the whole bag body is made of waterproof Oxford fabric. The utility model is widely applied to tool bags for line inspection.