Abstract: As an important part of historical and cultural heritage， the delineation of construction control zones for industrial heritage units is mostly based on the methods used for ancient buildings. However， this method often fails to account for the relevance and continuity of industrial activities， as well as their unique specificities. Furthermore， there is a lack of unified understanding and effective control over the indirect influence zones in the broader areas beyond the tightly-constructed control zones. Therefore， based on theories and practices related to the construction control zones of historical and cultural heritage， this paper employed field theory and incorporated relevant research to analyze the relational space and hierarchical field effects of industrial heritage. On the premise of constructing the concepts of strong， balanced， and weak fields， emphasizing the related activities and visual impacts， and highlighting the relationship between industrial heritage and the overall development level of the small city， this paper proposed a "2+2" classification concept and method for delineating four types of construction control zones. Additionally， the method was empirically applied to Xihai Town， a city known for its red ideals and beliefs and abundant industrial heritage.