［Objective］ In order to further enhance the anti-blast performance of aerospace vehicles，［Methods］four types of anti-blast coatings were selected as research objects. The finiteelement simulation software was used to simulate the anti-detonation performance to determine the bestanti-detonation performance of the rigid polyurea system. On this basis，a new type of anti-blast coatings were developed by adjusting the n（—NH₂）∶n（—NCO）ratio and adding functional fillers. The anti-blast performance of the anti-blast coating was verified through TNT flat explosion tests.［Results］The simulation and flat explosion test results showed that when the hard polyurea coatingthickness was 6 mm，the anti-blast performance was the best，with a protection effect of 31. 62%. On the basis of hard polyurea，when the n（—NH₂）∶n（—NCO）ratio was 1∶1. 05 and the carbon nanotube addition amount was 1%，the anti-blast coating could achieve the best anti-blast performance，onlyrequiring a coating thickness of 4 mm，with a protection effect of 28. 24%，approaching the protection effect of the 6 mm thick hard polyurea coating.［Conclusion］The developed product not only meet theanti-blast performance requirements of aerospace vehicles but also reducing the coating thickness， achieving the lightweight requirements of anti-blast coatings aerospace vehicles.