Abstract: Water and fertilizer integration technology is known as the "No.1 technology" of modern agriculture. It innovatively integrates irrigation and fertilization, realizing the fertilization of crops at the same time. It is of great significance to understand the research and application status of intelligent water and fertilizer integrated machine. This paper expounds the technology of water and fertilizer integration, summarizes the development status of intelligent water and fertilizer machine and intelligent decision system at home and abroad, puts forward the problems existing in the current technology development and summarizes the development prospect of the technology, in order to provide reliable research value for the in-depth research and application of water and fertilizer integration technology.