Air pressure and self-adaption combined variable nozzle and control method thereof

The invention discloses an air pressure and self-adaption combined variable sprayer which comprises a first three-way connector, one end of the first three-way connector is connected with a pressure sensor, one end of the first three-way connector is communicated with a pipeline, the other end of the first three-way connector is connected with a second three-way connector, one end of the second three-way connector is connected with a first electromagnetic valve, and the other end of the second three-way connector is connected with a second electromagnetic valve. The first electromagnetic valve is connected with a first variable nozzle, and the second electromagnetic valve is connected with a second variable nozzle. The single-chip microcomputer is adopted to control the types of the variable spray heads participating in work according to the liquid medicine pressure, variable spraying can be achieved under the condition that the liquid medicine pressure changes greatly, spraying is uniform, spraying particle