Irrigation device with external air source equipment and use method of irrigation device

The invention discloses an irrigation device containing external air source equipment and a using method thereof.The irrigation device comprises a water conveying pipe connected with the drainage end of a water pump body, when a flow mixing plate moves towards the outer side, a liquid pushing plate moves towards the outer side, water thrust can be generated at the end of a water spraying opening, and negative pressure suction force can be generated at an auxiliary flow liquid inlet channel section along with flowing of air in a flow mixing groove; meanwhile, liquid water discharged by a water guide pipe can be discharged into a flow mixing groove through an auxiliary flow liquid inlet channel, so that the liquid water in an annular frame is sprayed out from the end of a water spraying opening in a large range in a high-flow-speed mode under the cooperation of a liquid pushing plate after an expandable sleeve deforms and expands; when the flow mixing plate moves towards the inner side, a vertical plate pushes