A method of preparing a stable stick-type cosmetic composition includes separately stabilizing a clay mineral dispersion and a moisturizing component, thereby uniformly dispersing components in the composition. In a typical stick-type composition, components are not uniformly dispersed, and thus a stick formulation prepared using the same is easily broken upon external impact or the like, but the stick formulation prepared by the method of the present invention is maintained in spreadability and sensation of use, and is not easily broken.