Abstract: Based on the actual demand of landscape architecture, studied from relevant disciplines, fused landscape architecture and phenology, landscape phenology was constructed. Then its background,connotation, characteristics, research approach and significance were also expounded. Landscape phenology could not only consider the ornamental demand of landscape architecture, but also make use of the precisenature of phenology. Landscape phenology could greatly improve the quality and accuracy of landscape plants scenery design and promote the development of landscape architecture.