In order to provide theoretical basis for rational fertilization of Brassica oleracea L. var. capitata L，the effects of different fertilization modes on yield，nutrient absorption and utilization of Brassica oleracea and soil enzyme activity were studied by greenhouse cultivation.The results showed that:compared with the local conventional fertilization(CF)，under the condition of 45.3% reduction of chemical fertilizer，the treatment with slow-release fertilizer partially replacing chemical fertilizer in combination with 6000 kg · hm-2 bio-organic fertilizer had the best effect，which significantly increased the yield，the accumulation of dry matter and nitrogen，phosphorus and potassium nutrients in the whole plant，improved the soil enzyme activity effectively and promoted the absorption of some medium and trace mineral elements in leaf bulbs；The specific performances were as follows:compared with CF，the yield increased by 12.9%，the contents of Zn，Mg，Cu，Mn and Ca increased by 61.2%，7.2%，5.4%，12.5% and 10.7%，the content of Na decreased by 39.9%，the dry matter accumulation of the whole plant increased by 15.8%，the nutrient accumulation of nitrogen，phosphorus and potassium increased by 45.3%，17.1% and 41.9%，the fertilizer utilization efficiency increased by 24.3，8.8 and 33.3 percentage point，and the activities of urease，sucrase，alkaline phosphatase and catalase were increased by 15.9%，80.0%，9.9% and 121.3%，respectively.From the above results，it is suitable to use slow-release fertilizer instead of chemical fertilizer in combination with 6000 kg·hm-2 bio-organic fertilizer.