Anti-backflow air pressure sprayer

The utility model discloses an anti-backflow air pressure sprayer. The anti-backflow air pressure sprayer comprises a fixing plate, two one-way locks, a rotating nozzle and a three-way pipe, wherein the two one-way locks are distributed up and down and fixed by the fixing plate; an inlet of the one-way lock at the upper end is connected with a high pressure air pipe, and an inlet of the one-way lock at the lower end is connected with a high pressure water pipe; outlets of the one-way lock at the upper end and the one-way lock at the lower end are both connected with hydraulic pipes; ends of the two hydraulic pipes are connected through the three-way pipe, and the other end of the three-way pipe is connected with the rotating nozzle; the high pressure air pipe and the high pressure water pipe are provided with shutoff valves. The anti-backflow air pressure sprayer overcomes the disadvantages in the prior art, and is simple in structure and reasonable in structure; the high pressure air pipe is additionally arr