Construction maintenance device suitable for tunnel crack repair

The utility model discloses a construction maintenance device suitable for tunnel crack repair, which comprises an operating platform, crawler walking mechanisms are arranged at the left end and the right end of the operating platform, a remote control terminal is arranged in the middle of the rear end of the operating platform, and a charging basket is fixedly connected to the front side of the middle of the top end of the operating platform. According to the utility model, firstly, through the remote control terminal, the crawler walking mechanism is utilized to drive the operation table to a proper position, and then the first support arm, the first servo motor and the like are utilized to deliver the grouting nozzle, the air nozzle and the like to the crack; the three-way electromagnetic valve can be used for controlling the first air pipe to inject high-pressure air into the material barrel, grout can be conveyed to the grouting nozzle through the grouting pipe by means of pressure difference for crack r