The invention provides a flow coefficient 0.0328 light-media and high-energy head compressor model stage which comprises an impeller, a blade diffuser, a bend channel and a return channel; the outletof the impeller is provided with the blade diffuser; the return channel is arranged at the outlet of the model stage; the blade diffuser is communicated with the return channel through the bend channel; and for the model stage, the machine Mach number is Ma2=0.2-0.65, the designed point flow coefficient is phi 1=0.0328, the designed point energy head coefficient is tau=0.71, the polytropic efficiency under the working condition of the designed flow coefficient is eta pc1=0.8454, and the application flow range is 0.75-1.47 times of a designed point. The invention also provides a design method of the model stage. The flow coefficient 0.0328 light-media and high-energy head compressor model stage provided by the invention is high in model stage efficiency, high in energy head coefficient, large in hub ratio and small in span, can enable a light-media compressor to have relatively high running efficiency and relatively wide working condition range, is beneficial to lowering the working rotation speed of a rotor, shortens a bearing span and improving the stability of the rotor at the same time.