In order to study the effect of active components in plants on the vase life of Chrysanthemum morifolium Ramat. cut flowers, different concentrations of Zanthoxylum bungeanum Maxim, leaching liquor (liquor concentration of 50%, 60%, 70%, 80%, 90%) were sprayed on the C. morifolium plants. The contents of peroxidase (POD), chlorophyll, anthocyariin, malondialdehyde (MDA) and the cell membrane relative conductivity in leaves and petals were measured. The results showed that Z. bungeanum extract liquor preharvest treatment could decrease the cell membrane relative conductivity, increase the chlorophyll content, anthocyanin content, increase POD activity and inhibitate the production of MDA. Therefore it prolonged the vase life of C. Morifolium cut flower. The effect of 70% Z. bungeanum extract liquor concentration was the best.