Urban and rural planning are transforming physical space design to comprehensive design, and paying more attention to multidisciplinary knowledge systems and practical projects. Based on the planning reality and educational theory dimensions, this paper expounds on the problems of identity, discourse, teaching, and utility in multidisciplinary integration of planning, and judges that it has not achieved real multidisciplinary integration due to the limitations of professional knowledge, institutional mechanism, and planning itself barriers. Then, this paper puts forward strategies like strengthening multidisciplinary cooperation, removing institutional obstacles, and emphasizing the value and core of planning, to provide a reference for integrating disciplines in the planning field.