To achieve rapid preparation of monolithic molecular adsorption layer on cordierite surface by microwave sintering. The 13X-SiC coating was bonded and sintered on cordierite honeycomb ceramic surface by impregnation in coating liquid and microwave sintering in microwave oven. The coating liquid concludes 13X molecular sieve powder and SiC powder medium with strong microwave absorption capacity. Microwave sintering time was designed according to the mechanism of microwave heating. The percentage of plugged hole and loading rate on cordierite honeycomb ceramic were studied by macroscopic observation and weighing method, and the binding capacity between 13X-SiC coating and cordierite was verified by thermal cycling test. The morphology and microstructure were studied by SEM and XRD. The adsorption capacity of the composite coating was characterized by nitrogen adsorption method. The experimental result showed that monolithic molecular adsorption layer could be prepared within 2.1 minutes through microwave method. The plugging rate of honeycomb cordierite was less than 2.14%. In addition, the drop rate in thermal cycling experiment and the loading rate of 13X-SiC adsorption coating were about 0.47% and 18.69% respectively. The molecular structure of 13X sieve which existed 5 nm mesoporous as before was not affected by microwave sintering. After sintering, the composite coating bonded between SiC and 13X zeolite formed the pore structure, and the proportion of the macropores and mesopores were increased. Adding SiC into the mixed powders reduced the proportion of 13X zeolite, so that the specific surface area of 13X-SiC adsorption coating decreased from 517 m2/g to 131 m2/g. However, it is undeniable that the 13X-SiC adsorption coating had a certain adsorption property. The adsorption capacity of the composite coating can be influenced by the ratio of 13X zeolite and SiC. The 13X-SiC coating with strong binding force and high loading rate coating on cordierite surface can be prepared by microwave sintering method. The production time of cordierite monolithic absorber could be shortened, and the manufacturing cost of physical adsorption carrier would be reduced, which will be helpful to solve the problem of gas pollution in the closed environment. A reference method in this paper is put forward to s control the molecular pollutants of spacecraft in orbit.