Abstract: A method is presented for quantificational analysis for complex electromagnetic environment. Considering polarization case and modulation approach adequately，the connotation and definition of polar factor and modulation factor is givin. Based on the theory analysis and simulation of the effect of different polarization cases and modulations, the polar factor and modulation factor in the classic environment and its characteristic variation is given. The study is beneficial to research the method of complex electromagnetic environment quantificational analysis and evaluation.