Typical Planning and Design of Circular Sprinkler Machine ：Taking Aimin Wendu 200 hm2 Artificial Grassland in Shaogen Town of Ar Horqin Banner in Inner Mongolia as an Example

Taking typical planning and design of Aimin Wendu 200 hm2 artificial grassland that using circular sprinkler machine to irrigate alfalfa in Shaogen town of Ar Horqin banner in Inner Mongolia as an example，irrigation design processes which included data collection，project planning and project design of circular sprinkler machine were introduced.It had important guiding significance for improving design level of sprinkler irrigation project and improving quality of sprinkler irrigation works.