The main purpose of T35 type axial fan is an alternative 30K4 type, and similar foreign products were analyzed and compared by the model test study to determine the turbine airfoil, with a cylindrical hub structure, the motor has been modified design, the structure reduce flow loss and thus the efficiency of the fan exit, press the circle area calculation increased to 77 percent, according to exit the ring area calculation increased to 89.5%, reduced acoustic noise ratio A 3.6dB, but also enhance the strength of the blade root, avoiding the blade breakage. By T35 fan should be non-corrosive gases and significant dust, the temperature should not exceed 40 degrees.