Abstract:Jiaodong peninsular Locates in east of Jiaolai river in Shandong province. It has a coastline of 1700km and intertidal zone of 500km2. Owing to special regional circumstances of physical geography and geology, saline groundwater in this area is very suitable for mariculture. According to basic information, distribution characteristics of saline groundwater, resource stock and present condition of development and utilization in waterrich zones have been introduced. Pointing to geological environment problems happened in this area, relative suggestions for development and utilization of underground water have been put forward. It will play a vital role in conducting scientific development and utilization of regional saline groundwater in mariculture.