Focusing on the demand of polarized detection for space objects， the polarized characteristics of space object thermal control coatings are simulated based on three-component polarized Bidirectional Reflection Distribution Function （pBRDF）model， the reflected Stokes vector and Degree of Linear Polarization（DOLP） in passive illustration condition are given， and the pBRDF matrix in active polarized detection is presented. The simulation and measurement of polarized characteristics of two typical space object thermal control coatings SR107 and S781 show the accuracy of three-component pBRDF model. The polarized properties of space object thermal coatings are analyzed with simulated and measured data. The conclusion of this paper presents important references for space object polarized detection applications.