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In this paper, topology optimization method is employed to improve thermal insulation and stiffness performances of coupled thermoelastic structure.The structure is composed with porous material with homogeneous material microstructure.The effective thermal conductivity tensor and elastic tensor of the porous anisotropic material are obtained through homogenization theory.A steady state heat conduction problem and the coupling effect between the structural topology and the temperature field are considered in the analysis and optimization models.