Road crack welding machine

The utility model discloses a road crack welding machine which comprises a crack repairing machine, and the crack repairing machine is composed of a machine body, a material tank, a support, a placing box, a liquid gas storage tank and a controller. According to the crack repairing device, the crack repairing machine, the machine body, the material tank, the support, the containing box, the liquid gas storage tank and other structural components are arranged, the clamping assemblies are used in the cavity, and the two clamping blocks can move into the protruding blocks, so that the fixing blocks and the protruding blocks can be fixed, the liquid gas storage tank is fixed in the containing box, and the moving assemblies are used for moving the liquid gas storage tank. According to the road crack welding machine, the two clamping blocks can be moved out from the interiors of the protruding blocks, so that the liquid gas storage tank can be moved out from the interiors of the containing boxes, and the road crack