Abstract: Water and fertilizer integration technology combines soil foundation and crop demand rule，mixture of liquid fertilizer and irrigation water is provided to cultivated crops regularly，quantitatively and proportionally through a controlled pipe network.It has significant cost-saving，efficiency-increasing and environmental protection effects.Equipped with Internet of Things and automatic control equipment，it can realize intelligent modern agricultural technology.Application situation and existing problems of water and fertilizer integration technology in China was introduced，and corresponding countermeasures were put forward，which were of great significance to promote development of agricultural modernization and enhance agricultural productivity.