Urban spaces are constantly changing. H. Lefebvre’s trialectic spaces are an analytical tool used to explain changes in urban spaces. However, in trialectic spaces, which space plays a leading role? What is the driving force of interactions in such spaces? At present, there is a lack of research on this issue. This paper, in response to the views of N. J. Babere, takes the Xisi historical and cultural block in Beijing as a case study to answer these questions and uses questionnaires, in-depth interviews, and follow-up surveys to analyze the interaction process of trialectic spaces within green spaces. Then, it analyzes the driving force of this interaction. The purpose of this study is to determine which space plays a leading role in interactions among trialectic spaces and what the driving force behind such interactions is. This paper draws the following conclusions: (1) Representational spaces play a decisive role in interactions among trialectic spaces.. This is consistent with Babere’s findings. (2) In historical and cultural blocks, culture is the driving force promoting the interaction of trialectic spaces. (3) The direction of interaction among trialectic spaces can be either clockwise or counterclockwise.