In the context of the high-quality economic development imperative, it is both necessary and urgent to expedite and deepen the integration and interconnection between cultural heritage and the tourism industry. This study constructs an evaluation index system for the integration and development of cultural heritage and tourism by reviewing pertinent literature and computing index weight values utilizing the Analytic Hierarchy Process (AHP). Furthermore, this paper introduces a model that assesses the coupling degree and coordination between these sectors by integrating the index system and analyzing the decoupled levels of coupling coordination. Additionally, a system dynamics model is developed to facilitate innovative enhancement of this integrated development. Empirical results indicate that the integration and development level of cultural heritage and tourism in Longji Town is on an upward trajectory. However, it remains at a nascent stage of coordination with a score of 0.6983. Innovation-driven initiatives have spurred growth across all dimensions within the cultural heritage and tourism subsystems in Longji Town. By 2024, the integration level between these two sectors is projected to reach 0.937, signifying a state of high-quality, coordinated development. This research provides empirical support for the innovative advancement of integrated development between cultural heritage and tourism industries. It offers valuable insights for refining and upgrading the strategy for integrated development.