Taking the cut flowers of Black Magic，the rose variety，as the materials，4 formulas are arranged to carry out the vase test with distilled water as the control group. During the vase，the author determines and analyzes the flower-spray fresh weight，flower diameter，chlorophyll content and CAT activity，and the results show that the preservative effect of formula C（50mg/L Sug+200mg/L 8-HQC +25mg/L STS+350mg/L CaCl2）is the best.