Spraying device for construction of water-based heat insulation and heat preservation coating

The utility model discloses a water-based thermal insulation coating construction spraying device which is applied to the field of spraying equipment and comprises a base, a supporting seat is connected to the top of the base in a bolted mode, a push handle is installed on the supporting seat, a tank is installed on one side of the supporting seat through a fixing piece, a pump is installed on one side of the tank through a fixing piece, and a water pump is installed on the pump. An atomizing gun head is arranged at the top of the pump body, one end of the atomizing gun head is in threaded connection with a first extension pipe, and a second extension pipe is slidably connected into the first extension pipe; the first extension pipe, the second extension pipe and the third extension pipe are mounted on the atomizing gun head, and after a worker holds the third extension pipe by hand, the distance between the atomizing gun head and the worker can be prolonged, so that the atomizing gun head can spray to a high