Integrated tree chemical injection gun

The utility model discloses an integrated tree chemical injection gun which comprises a chemical bottle, wherein chemical in the chemical bottle is pressed to a front end of a gun body through a manual piston rod in the gun body, and an impact hammer mounted in an injection nozzle in the front of the gun body for impacting the injection nozzle into a trunk body, wherein the injection nozzle is thin and flat; an injection hole is upward formed at a front top; the impact hammer is slidingly mounted on the gun body; and a metering tuning knob for adjusting stroke thereof is mounted on a tail end of the manual piston rod. The front end of the gun body is additionally provided with the thin and flat injection nozzle with the upward injection hole; moreover, the chemical is pressed to the injection hole from a liquid path and injected at a certain angle with a horizontal direction by means of the impact effect of the impact hammer in the pressing portion, so that resistance of the chemical in a tree body can be red