Abstract: A study on the influence of wind stress on the flowcharacter of water in Baiyangdian Lake is carried out, and we arrive at someimportant conclusions. These are: (1) wind stress can be regarded as themain driving force of the water circulation flow; (2) the water flowdirection of surface layer is the same direction as the wind moves, whiledirection of the layers below is on the contrary or is almost inversed; (3)the flow character of water beneath the surface layer is complex. Doubleeddies can be seen evidently on the second horizontal layer; (4) thetopography influences the vertical flow heavily, double eddies can also beseen in the complex vertical direction. The dynamic character of water inBaiyangdian Lake is studied in this paper, which laid a solid foundation forthe further researches on biology.