Effects of the orthogonal design of nitrogen,phosphorus,kalium,calcium on morphology,vase life,petals malondialdehyde(MDA),super oxide dismutase(SOD),soluble sugar and protein content were studied by using potted lily,which was to explore the ratio of fertilization on the quality of lily cut flowers.The results showed that the combinations of N,P,K and Ca nutrition were optimized as follows:300 mg/kg,100 mg/kg,150 mg/kg,120 mg/kg.The combinations could increase plant height,flower diameter,leaf area and prolong vaselife,keep the petals SOD activity in the high level,and delay the reduction of soluble sugar,soluble protein during the period of cut flower in vase.The assessment indicators of SOD activity,soluble sugar,soluble protein content and N,P,Ca nutrition were positively correlated,but negatively correlated with K in the three period of vase〖KG*9〗4 d,vase7 d and vase10 d.