Abstract: A study of technology for producing composite powders by spray-drying of slurry, including the design of experimental equipment and process, preperation of slurry and spray-drying technology, etc. is described in detail in this paper. The properties of the composite powders obtained were determined and the plasma spraying experiments were carried out to examine the properties of coating layers. The slurry spray-drying method is considered to be of good prospects and wide applications in producing various composite powders being suitable for coating.