Developing　a　flame　retardant　and　puncture　resistant　nylon　6　(PA6)　film　composite　with　excellent　gas　barrier　property　as　a　food　packaging　material　is　still　a　great　challenge.　Herein,　microencapsulation　and　hydrogen-bonding　interaction　were　adopted　to　synthesize　a　multifunctional　additive　(SiO2@CS@GO-S),　which　simultaneously　improved　the　mechanical,　gas　barrier　and　flame　retardant　performances　of　PA6　film.　The　obtained　results　indicated　that　the　gas　barrier　property　of　the　as-prepared　PA6　film　composite　containing　0.1　wt%　SiO2@CS@GO-S　(PA6/SiO2@CS@GO-S-0.1)　was　obviously　improved.　For　instance,　the　oxygen　transmission　rate　of　the　film　composite　decreased　dramatically　by　52.0%　compared　with　that　of　PA6　film.　Furthermore,　the　puncture　resistance　of　the　PA6/SiO2@CS@GO-S-0.1　markedly　increased　from　18.3　N　of　PA6　to　25.3　N.　Additionally,　both　thermal　stability　and　fire　safety　of　the　PA6/SiO2@CS@GO-S　film　composites　were　enhanced.　The　peak　of　heat　release　rate　and　total　smoke　release　of　the　PA6/SiO2@CS@GO-S-0.1　were　reduced　by　10.7%　and　19.3%,　respectively,　compared　to　those　of　PA6　film.　This　work　provides　a　new　paradigm　for　creating　a　multifunctional　PA6　film　composite　with　high　performance　for　grain　preservation　and　loss　reduction.　©　2024　Elsevier　Ltd