In order to enhance the management and decision making level of irrigation area, and improve the utilization efficiency of water resources,the paper introduced 3D GIS technology into the daily operation and management of irrigation area. First of all,the overall framework of a 3D GIS information management system for irrigation area was built, and then every function module and database belong to the system was designed,and the system was developed based on the integrated secondary development platform at last. The results show that the basic geographic information of entities in the irrigation area can be more intuitively obtained , in the meanwhile, spatial data analysis can be carried out in accordance with special requirements and applications in 3D virtual space.So the plan of irrigation area and utilization of water resources have higher efficiency,which has important significance and practical value for the sustainable development of irrigation area.