Abstract: αMoC1－xpromoted by K2CO3, was studied as catalysts for carbon monoxide hydrogenation reactions under conditions of 573, 8.0MPa, GHSV=2000h-1,n(H2)/n(CO)=1.0. Unpromoted αMoC１－xproduced mainly CO2 and light hydrocarbons, addition of K2CO3 as a promoter, however, resulted in remarkable selectivity shift from hydrocarbons to alcohols. Moreover, the promoter of potassium enhanced the ability of chain propagation of αMoC１－xwith higher selectivity of C2+OH. The investigations of the effects of the loadings of K2CO3 in αMoC１－xrevealed that the maximum yield of alcohols was obtained at K/Mo (mol ratio) =0.1. However, there was no significant difference between αMoC１－xand K/αMoC１－xcatalysts in the distributions of alcohols and hydrocarbons; they both have similar linear A-S-F plots. Though, the promotion effects of potassium on the formation of higher alcohols could be attributed to the formation of "K-Mo-C" phase in K/αMoC１－xcatalysts, which was considered to be the active sites for the alcohols synthesis.