This paper studied the water flow of SPAC system in Zoige wetland, so as to evaluate accurately and utilize suitably water resource of wetland. Based on the distinctive studies on the sub systems of soil plant atmosphere systems and their interfaces, a new approach of simulation is carried out using coupled model by inputting data needed. The model is tested by using the measured parameters, and the model is run under the conditions of changing the values of the main parameters within certain range to analyze the sensitivity of the parameters. This model can describe the eco hydrology process of Zoige wetland. The result shows that for Zoige wetland plant, the “ideal” ground water level is 60~100 cm, and the “feasible” ground water level is 0~60 cm and 100~250 cm.
