The work aims to study effect of low earth orbit environment on the performance of high absorption and high emissivity inorganic thermal control coating (KS-B coating). The KS-B coatings were irradiated with atomic oxygen dose of 3.9×1022 atoms/cm2, vacuum-ultraviolet dose of 5000ESH, vacuum-proton radiation flux of 9.3×1011 p/cm2, vacuum-electron radiation flux of 1.108×1014 e/cm2. By analyzing the changes of coating solar absorption ratio (αS), hemispheric emissivity (εH), morphology, composition and mass loss rate before and after the space irradiation tests, the stability of KS-B coatings in simulated enviroments was studied. After AO exposure, the αS of the KS-B coating increased by 0.003, and the εH increased by 0.004; the coating surface became roughing; silicon and oxygen content on the coating surface decreased slightly. At the initial exposure, the coatings’ mass loss rate gradually increased. The final mass loss rate was 0.96%. After VUV irradiation, the αS of the KS-B coatings increased by 0.003, and the εH did not change. After vacuum proton and electron irradiation, the αS of the KS-B coatings increased by 0.001, and the εH did not change. After AO, VUV, proton and electron simulated irradiation tests, the smallΔαS and ΔεH change indicated that the coating has stable structural properties, which can meet long-life service requirements of low orbit spacecraft such as the space station.