A certain type of civil aircraft wing anti-ice system performance validation was introduced briefly first:the 2.5D test model to verify the performance of three dimensional wing anti-ice system. A typical test condition selected to carry out the calculation of 2. 5D model and 3D model performance, meantime the icing wind tunnel test result of 2.5D model for same condition was analyzed. At last, the 2.5D model calculation results with the experimental results were compared and analyzed, and fixed the calculation results of 3D model,so as to achieve the purpose to verify the ice protection system performance.