Simple powdery medicine spraying device

The invention discloses a simple powdery medicine spraying device which comprises a spraying body, an air spraying groove and a medicine storage groove are formed in the upper portion and the lower portion of the spraying body respectively, the air spraying groove comprises an injection cavity, an injection piston rod is arranged in the injection cavity, the lower end of the injection cavity is communicated with an air circulation channel, and the air circulation channel and the lower end of the medicine storage groove are communicated with a mixing tank. The front end of the mixing tank is communicated with an injection pipe; a sealing mechanism is arranged between the mixing tank and the injection pipe and comprises mounting grooves symmetrically formed in the left and right sides of themixing tank, a sliding rod is fixed to the end of each mounting groove and sleeved with a sliding sleeve, a sealing block is arranged at the end, close to the mixing tank, of each sliding sleeve, andthe other end of each sli