Welding device for crack maintenance of wind driven generator blade

The invention discloses a welding device for wind driven generator blade cracking maintenance, which comprises a blade to be repaired, a tool assembly is arranged at the bottom end of the blade to be repaired, a detection assembly is arranged at the upper end of the tool assembly, a welding assembly is arranged in the detection assembly, the tool assembly comprises a base, and a batten is fixedly mounted on the upper surface of one end of the base. A slide way is formed above the batten, the slide way formed in the batten is movably connected with two clamping plates, the clamping plates are in bilateral symmetry, threaded holes are formed in the bottom ends of the clamping plates, the screwing directions of the threaded holes formed in the bottom ends of the clamping plates are opposite, the clamping plates are in transmission connection with first lead screws through the threaded holes formed in the bottom ends, and shaft bodies of the first lead screws are fixedly connected with first motors. The welding d