Abstract: Wetland is one of the most important environmental Capitals, its ecological characteristics is differing to land and water, and is unique in hydrogeology under the inter-function of themselves and the special ecological function. Wetland geo-environment study is indispensable in Wetland study, Wetland plan and Wetland ecological recovery. The article briefly analyzes the Tong lake wetland evolution, and the reduction factor of the Wetland.