A new theoretical analytical model for the feedback type based opto-e lectronic hybrid oscillator is proposed and verified by experiments.It can not only accurately characterize both the output power and phase noise of the oscillation signal,but also be compatible with Yao′s classical theory model.In addition,this model can refle ct the nonlinear nature of the opto-electronic oscillator and owns good practical value.As for traditional models,only the nonlinearity of electro-optic modulator is considered and the microwave amplifier is taken as linear device,so when the am plifier works in the nonlinear region,traditional models would be no longer effective.Using the quasi-linear analytical m ethod,this new model has wider application fields and higher accuracy resulting from the consideration of both nonlinearities of elect ro-optic modulator and amplifier.Based on this model, the effect of the nonlinearity of amplifier on the output power and phase noise of the oscillation signal is also analyzed.Experimental results show that this new model can be used in all kinds of gain-compression c onditions.In addition,the physica l phenomenon of up-conversion of amplifier′s colored noise is analyzed and we propose that gain compression finished by modul ator and keeping the amplifier working in the linear region is an effective way to reduce the near-DC phase noise of OEO.