Abstract: According to the flower characters, the cultivars of Chimonanthus praecox were investigated and classified in Hangzhou city, China. The results showed that 65 cultivars in Hangzhou were divided into three groups according to the purple speckles of inner tepals and identification key of the cultivars has been compiled. In addition, the paper analyzed the application of Ch. praecox cultivars in landscape architecture in Hangzhou and suggested that fine cultivars should be selected to develop landscaping and cultural function.