The invention provides a granulation process of a high-combusting-speed gas generator. According to the process, a mixed granulation slurry solution is sprayed into a high-temperature container by using a spray gun in an airflow atomizing way, the granulation slurry solution is instantaneously dried into high-combusting-speed gas generator particles and fine powder under the airflow effect of sprayed airflow mist, then the fine powder and the high-combusting-speed gas generator particles are separated, the fine powder is delivered to the atomized material sprayed out of the spray gun again tobe re-compounded with the atomized material, and finally the granularity of the obtained high-combusting-speed gas generator is of 20-100 mesh. By adopting the process, the proportion of the fine powder with the granularity smaller than 100 mesh in the generator particles can be obviously reduced, and accordingly the particles are more suitable for tableting. In addition, by adopting the sprayinggranulation process, the contact area of the components of the gas generator is larger, and finally the combustion speed of the product is higher.