Agricultural informatization irrigation device capable of achieving large-scale irrigation

The agricultural informatization 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, negative pressure suction force can be generated at an auxiliary flow liquid inlet channel section along with flowing of gas in a flow mixing groove, and the water spraying opening can spray water on the water spraying opening end; 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 a limi