Main influencing factors affecting the ecology benefit value of woodland are analyzed, mainly including the water conservation value, environment cleaning value, water and soil conservation value, and climate regulation value. Evaluation model of the ecology benefit value of woodland is put forward which can deal with the uncertain information. Method for determining index weights is discussed, as well as the processing method for uncertain information during the evaluation of ecology benefit value of woodland. Finally, the feasibility and convenience of the evaluation model of the woodland ecology benefit value are illustrated with examples.