A polarization multiplexing scheme for polarization division multiplexing orthogonal frequency division multiple with coherent detectedbased passive optical networks was proposed,in which polarization multiplexing was used at the Optical Network Unit(ONU) for the upstream transmission to increase the transmission data rates and double the spectral efficiency.ONU colorless was realized by optical carrier way.VPI and MATLAB were used for the PMCOOFDMPON simulation platform.The results show that the proposed PMCOOFDMPON architecture is scalable,improves the data rates in the upstream of PMCOOFDMPON,and ONU colorless is realized effectively.Moreover,with coherent detected,the receiver sensitivty is improved.