Cinnamaldehyde (CIN) is gaining interest as a highly effective natural antimicrobial agent to extend the shelf life of fruits. However, its inherent instability limits further applications. In this work, a new strategy for the synthesis of HKUST-1 to encapsulate CINs by in situ growth method using copper-ammonia fiber as precursors is proposed. Subsequently, combining it with chitosan quaternary ammonium salt (CQAS) to formulate chitosan quaternary ammonium salt/copper-ammonia fiber@HKUST-1/cinnamaldehyde (CCAHC) packaging film. Based on copper-ammonia fiber to prepared HKUST-1, on the one hand, it has excellent compatibility with CQAS and improves the mechanical properties of the film. On the other hand, its porous structure also encapsulates CIN and significantly improves the stability of CIN (203h). Benefiting from the sustained release of CIN and Cu