Abstract: The effect of reduced K-Co-Mo catalysts made by sol-gel methods on the performance for mixed alcohol synthesis is investigated. The results reveal that the addition of promoter potassium and cobalt enhances the alcohol production remarkably, especially the selectivity to C2+-alcohol. In addition, the catalytic properties are obviously influenced by reaction conditions. Increasing the reaction temperature improves the space-time-yield(STY) of alcohol, but decreases the selectivity to alcohol while raising the pressure or the space velocity are in favor of the alcohol synthesis. Under the conditions of 230 ℃，6.0 MPa，14 400 h－1, over the reduced K-Co-Mo ultra-fine catalyst, the STY and selectivity of mixed alcohol are 375.4 g/kg·h and 70.2%,respectively, and the ratio of C1OH to C2+-OH is only 0.48.