Spray gun capable of automatically stopping water

The invention provides a spray gun capable of automatically stopping water. The spray gun comprises a water intake pipe, a decorative shell, a water intake main body, a water intake device, a resetting device, a water-out device and a fixing device; the water intake pipe, the water intake main body and the water-out device are sequentially arranged from top to bottom; the decorative shell is arranged on the outer sides of the water intake pipe, the water intake main body and the water-out device in a sleeving manner; one end of the water intake main body is connected with the water intake pipe; the other end of the water intake main body is connected with the water-out device; an accommodating groove is formed in the middle of the water intake main body; the resetting device comprises a floating ball, a push rod and a resetting piece; one end of the push rod is connected with the floating ball; the other end of the push rod is connected with the resetting piece; the floating ball is arranged in the water-out