Tunnel staying robot

The utility model relates to a tunnel staying robot which solves the technical problem that the cleaning efficiency of a tunnel wall is low. The tunnel staying robot comprises a base, a support, a cleaning assembly, a water storage tank and a controller, moving wheels and a wheel driving motor for driving the moving wheels are arranged on the base, the support is installed on the base, a gear transmission mechanism is installed on the support, and the cleaning assembly is in transmission fit with the gear transmission mechanism; the number of the cleaning assemblies is two, each cleaning assembly comprises a length-adjustable swing rod, a supporting plate connected to the end of the swing rod, a water spraying head and a cleaning brush, the water spraying head and the cleaning brush are installed on the supporting plate, the water spraying head faces the cleaning brush, the cleaning brush comprises a plurality of elastic bristles used for making contact with the tunnel wall face, and the two swing rods are ar