Design of plant landscape form is a critical part of plant landscaping, and it is an important direction of modern researches on urban plant landscaping to promote the development of plant landscape via the interaction between landscape form design and other means. By elaborating five major influence factors of landscape plants, namely 'flexibility', 'art', 'subject', 'mode', and 'artistic conception', this paper explored the application of construction thinking in the construction of urban plant landscape form, in order to provide theoretical basis for the development of urban plant landscape form.