Abstract: The wind resource evaluation is the foundation work for wind farm development, which is directly related to the accuracy of the microscopic site selection and influences on the economic benefit of the wind farm. The current wind resource evaluation method is mainly based on the numeric simulation. The wind resource data obtained by wind tower in fixed altitude, the topographic map and other materials were imported into the certain software to calculate the wind resource distribution in the altitude of the wheel hub of the wind turbine. In this method, due to that there is error in the previous data processing, certain error exists in the calculation result of the wind resource distribution. The wind resource evaluation method for complex terrain by multiple wind towers with comprehensive landform and wind shear data fitting and correction was proposed. Firstly, the wind data in fixed altitude measured by the wind towers was used to calculate the wind resource of each wind turbine site in selected area at the fixed altitude of wind tower，the known topography data of the wind tower positions and the wind shear data were used to simulate the wind shear of the planned wind turbine positions, the wind resource in altitude of wind turbine wheel hub was calculated by the law of the wind speed variation along with the wind shear. At last, the accuracy of the model was proved by practical example.

Key words: wind resource evaluation, wind resource distribution, complex terrain, correction method