Abstract: In order to reduce influence of pests on fruit trees，a 3PZ-6000 intelligent apple plant protection machine was designed，which has compact structure，with an upward and downward axial flow pneumatic spraying device and a hydraulic driving continuously variable speed crawler type walking mechanism.Also，it equipped with wireless radio frequency control platform，could realize intelligent control of machine start and stop，speed and dosage adjustment，greatly improve fficiency of apple plant protection links.Economic，ecological and social benefits were obvious.It was an important model to promote whole process of apple production mechanization.