The cut flowers of Zantedeschia aethiopica were selected as materials to study the effect of six different concentrations bamboo vinegar on the preservation of cut flowers of Zantedeschia aethiopica. The vase life, water balance value, soluble sugar, soluble protein and MDA content were tested. The results showed that bamboo vinegar at 1000∼1500 times could effectively decrease the loss of water, slow the rate of decline of soluble sugar and protein content and the rate of generation of MDA of cut flowers during vase holding, thus extending the vase life of cut Zantedeschia aethiopic flowers, especially the 1500 times is better. In all, bamboo vinegar of proper concentration can delay the senescence and extend florescence of cut Zantedeschia aethiopic flowers.