The contemporary sense of small watershed comprehersive harnessing is to stress the point that controlling soil and water loss must combine with the sustained development of watershed economy, and must cons ider all kinds of factors fully, such as soil and water conservation projects construction, improvment of eco-environment quality and economic development,ect. Therefore, it is valuable to apply the multiobjective decision into small watershed comprehensive harnessing planning. The building and solwing of multiobjective planning model for aspecific watershed,and the comprehensive evaluating of the alternatives are described.