Abstract: It was a consensus of some Chinese scholars who received or touched landscape architectural education that landscape architecture was a “comprehensive technology” and “comprehensive science”. Meanwhile, educational activities related to landscape architecture were carried out in established disciplines, such as horticulture, forestry, municipal administration and architecture. Accordingly, there were considerable theoretical explorations and constructions based on foreign theories and national traditions. Such a “quantitative change” of knowledge development and accumulation was the historical basis for the “qualitative change” of the establishment of the “Garden Making Group” in 1951. By reviewing the content and origin of the theoretical learning and exploration of professional scholars with different academic backgrounds, this research analyses the main points and the ways of their theoretical construction to provide an overall picture of the theoretical contention and debates in the modern academic circles. It also clarifies that internal relationship between the theoretical exploration and knowledge accumulation of modern landscape architecture and the establishment of modern discipline, objectively evaluates the historical value of the theoretical construction from the multidisciplinary perspective, deepens the understanding of the continuity and integrity of the historical context of the landscape architecture discipline, and provides historical lessons and reference for the construction of the contemporary Chinese landscape architecture theory system.