With the reform of the national system and the introduction of a series of policies on territorial space planning, urban and rural planning is facing great knowledge renewal. The principle of urban and rural planning, as a core course of urban and rural planning with wide knowledge coverage and close combination with policies, is also facing great reform challenges. Based on the perspective of land space planning, this paper starts from the background of updating the knowledge system of urban and rural planning, takes the course of Principles of urban and rural planning as the research object, and tries to explore the establishment of new teaching logic methods by introducing the changes of the course system, the essence of the changes of the knowledge system and the connotation of the transformation of teaching logic. This paper focuses on the logical changes of research content, the changes of knowledge output and application logic and the changes of practice logic. In the aspect of studying the change of content logic, it is necessary to guide the new development concept value and enhance the learning of object knowledge. In the aspect of knowledge output and application logic change, we should strengthen the study of classical knowledge and build a new knowledge framework. In terms of the change of practical logic, we should strengthen the development of practical lessons and improve teachers' practical ability. Finally, taking a university in Sichuan Province as an example, the teaching practice results under the new teaching logic are briefly explained. It is hoped that the series of viewpoints presented by the article will provide references for the teaching practice of urban and rural planning and other related disciplines, and provide a boost for the scientific development of human settlements environment in the new era.