The inlet distortion is a key factor of causing inner flowing unsteady of engine compressor and it greatly limits the capability and the steady range of compressor. The method of uniting numerical simulation with model analysis is adopted in the condition of distortion and a model is established which is used to calculate the transfer characteristic of the inlet distortion in the compressor. The influence of relative parameter of distortion transfer process is studied according to a third class compressor, and the axial distributing instance of the intensity and the range of distortion is calculated. The simulation result shows that the smaller the rotating speed, the weaker the export intensity of distortion of compressor; the export total pressure is distributed uniformly, and the export range of distortion is smaller under the same condition of distortion pattern. For the total pressure and total temperature distortion, the bigger the inlet range of distortion, the stronger the export intensity of distortion of compressor is. Without reference to total pressure or total temperature distortion, the radial attenuation of distortion is stronger than the circumferential attenuation of distortion for the third class compressor.