Objective: Recent year, a novel method which is a unity of distributed fast polarization scramblers (D-FPSs) and forward error correction (FEC) to mitigate PMD has been proposed and researched.The scrambling speed and the distribution model of the fast polarization scrambler (FPS) are two major factors for this mitigation scheme, while the research for FPSs distribution is insufficient.In order to investigate the impact of the FPSs distribution, a kind of simulation models for PMD mitigation using D-FPSs and FEC and the corresponding performance will be introduced in the paper.Method: Firstly, waveplates method is used to simulate the FPS and PMD emulator, respectively.Each FPS is depicted by the product of Jones Matrices of three waveplates in time domain, and the product of three Jones Matrices is used to describe a waveplate.By contrast, a series of cascaded waveplates (more than ten) constitutes the PMD loaded along the fiber channel in frequency domain.Secondly, for allowing the FEC performing the correctable ability sufficiently, the scrambling speed of FPS should match the burst-error-correction length (BECL) of FEC.At last, to examine and complete this model, simulations by computer have been done to find out the reasonable relationship between optical signal-to-noise ratio (OSNR) and bit error ratio (BER) at given distribution pattern of FPSs.Result: In order to improve PMD tolerance, the combination of FEC and D-FPSs is required.On the other hand, different distribution patterns of FPSs reveal different mitigation effect.Conclusion: This precise and available simulation model can provide some assistance for other similar or interrelated researches on distribution pattern of FPSs for PMD mitigation using D-FPSs and FEC in high-speed optical communication systems.