In order to improve the efficiency of agricultural greenhouse irrigation, the research on water-soluble fertilizer proportioning technology for agricultural greenhouse irrigation based on big data cloud platform was put forward. Firstly, the characteristics of irrigation and non-integrated technology were introduced, and then the management mode of water-soluble fertilizer proportioning machine for agricultural greenhouse irrigation technology based on big data cloud platform was analyzed. It adopts the management mode of user+fertilizer dispensing self-service machine+plot soil testing formula database based on GIS+e-commerce platform+fertilizer manufacturer, and adopts the management mode of automatic control, physical measurement, sensor, computer management and other technologies to realize the sales and purchase processes such as self-service ordering, payment and logistics management of the Internet of Things. Through the automatic fertilizer distribution equipment and software system, with the fertilizer distribution cloud platform management system as the core, the farmer information, regional location information, farmland information and crop information are integrated to realize automatic, intelligent and remote management of fertilizer sales and irrigation management.