The Xitiao River is the main branch of Taihu basin.Due to the disturbance of human, the river health has been damaged and its functions have been reduced gradually. Based on the meaning of river health, 3first-grade diagnostic indexes were selected, namely river morphology, social economic function and ecologic function. 18 second-grade diagnostic indexes were then determined by considering the present health status and obtained data of the Xitiao River. A multi-objective and multi-layer fuzzy model was used to diag-nose the river health and determine the index standard character values and the index weights.Through cal-ulation and analysis, the Xitiao River health was almost in the middle and good condition. The main factors were the changing river morphology and worse water quality.It is suggested that the main restoration meas-ures are to create diversity habits, control non-point source pollution and built adapting management pro-grams of reservoirs