The result of field experiment continuous for two-years and demonstration of big area in cauliflower showed that the best appropriate application amount of K_2O is 180 kg/hm~2 on condition that apply commercial concentrated organic fertilizer 4500 kg/hm~2, N334.5 kg/hm~2,P_2O_5 108 kg/hm~2. it's efficacious for increase biological yield and net vegetable rate thus to gain yield remarkably. Yield of cauliflower is higher by 13.3% than habitual combined N, P fertilization. And applying vegetable special fertilizer can increase production 19.4% under same nutrient condition. Combined application N, P and K fertilization can increase quality and merchandise rate or cauliflower also to increase economic benefits.