Abstract:Edible packaging materials based on polysaccharides have gained widespread attention due to their excellent degradability. This paper developed a bilayer active film based on konjac gum （KGM） loaded with thyme essential oil Pickering emulsion（OPE）. The bilayer active film significantly improved the mechanical properties of KGM single-layer active films and also successfully achieved unidirectional release of thyme essential oil， thereby prolonging its retention time of the essential oil. Furthermore， the physicochemical properties and antibacterial activity of the bilayer active film were measured， revealing its excellent antioxidant， antibacterial， and biodegradation properties. When applied to salmon preservation， the bilayer active film was found to successfully delay the increase in total volatile base nitrogen（TVB-N） and pH values of the salmon during storage compared to commercial cling film. These findings highlighted the potential application of bilayer active films in food preservation.