The microstructure, conductivity and absorptivity of an ultra-high absorption conductive matting coating (BN-1 coating) and the influence of space irradiation environment on it were studied to evaluate whether the coating meet the requirements of long-life space optical component. Firstly, the micro morphology, element composition, contact resistance, solar absorption ratio (αs) of the BN-1 coating were tested to investigate the conductivity and extinction properties of the coating. The structural basis of the coating extinction performance was analyzed on this basis. Then, the BN-1 coating was irradiated with atomic oxygen dose of 2.0×1021 atoms/cm2 and vacuum-ultraviolet dose of 5000 ESH respectively. The effect of space simulated irradiation environment on BN-1 coating is analyzed through the test results and the stability of BN-1 coating against space environment was studied. Micro-nanometer holes are evenly distributed on the surface of the BN-1 coating which was called light trap structure, leading to the excellent conductivity and absorptivity of the BN-1 coating. The contact resistance is less than 5 mΩ, and the solar absorption ratio (αs) is greater than 0.98. After AO exposure, the solar absorption ratio (αs) of the BN-1 coating decreased by 0.0049 and the change value is less than 0.01. It has good resistance to atomic sunlight irradiation. After VUV irradiation, the solar absorption ratio (αs) of the BN-1 coating increased by 0.0009 and the change value was less than 0.01. It has good resistance to vacuum ultraviolet radiation. BN-1 coating has excellent conductivity and extinction performance. After AO and VUV simulated irradiation, BN-1 coating αs change is small and has good space irradiation resistance, which can meet the long-life service requirements of space optical components such as star sensor and space camera.