The coimpregnation of the glucose and cobalt nitrate aqueous solution into SiO2 followed by the carbonization in an inert gas was demonstrated for the preparation of the directly reduced Co-xC/SiO2 (x: glucose to SiO2 mass ratio) Fischer-Tropsch (FT) catalysts. The as -prepared CoxC/SiO2 (x = 0.1, 0.5, 1.0, 1.5) without any pretreatment was evaluated for FT synthesis under typical conditions. Significantly, the completely reduced Co-xC/SiO2 were obtained when the x was at or above 1.0, and the maximum normalized FT activity (cobalt-time-yield, CTY) of 3.5 X 10(-4) mol(CO).g(CO)(-1).s(-1) over Co-1C/SiO2 was doubled the activity of the high -temperature reduced Co/SiO2. Moreover, light hydrocarbons (C-1 similar to C-4) were favorably formed over Co-xC/SiO2, and the product distribution can be regulated via simply changing the ratio of the glucose to SiO2. The simple procedure and the cheap glucose make the directly reduced Co-xC/SiO2 catalysts very promising for the development of a more efficient FT process.