In the era of experience economy, with the prominent demand for consumption upgrading and the deep integration of culture and science and technology, the rapid development of immersive cultural experience has been promoted. In view of the practical problems in the immersive cultural experience project, such as excessive reliance on technical scenes, single content, easy replication and weak continuity. Based on the qualitative research method of grounded theory and combined with the existing literature, this paper defines the important role of "interaction" in immersive cultural experience, and reveals the core mechanism and implementation path of interactive design in immersive cultural experience. The research finds that interaction is an indispensable factor in immersive cultural experience, the basis and premise of realizing "interaction" in immersive cultural experience include five links: scene setting, situation building, emotion refining, collective excitement and intention strengthening. In addition, this paper puts forward the realization path and specific operation suggestions of interactive design in immersive cultural experience from three aspects: preparation before activities, sublimation in activities and continuation after activities.