Flexible　polyurethane　foam　(FPUF)　has　been　considered　as　an　excellent　material　in　many　fields,　such　as　furniture　and　electromagnetic　interference　(EMI)　shielding　products　due　to　its　lightweight　and　flexibility.　However,　there　is　a　severe　fire　hazard　problem　for　FPUF　that　makes　it　unsuitable　to　be　used　in　practical.　Herein,　a　facile　method　was　to　prepare　anti-dripping　FPUF　via　electroless　plating　at　ambient　temperature.　The　silver　nanoparticles　(SNPs)　were　in-situ　grown　on　the　surface　along　with　the　polydopamine　(PDA)　as　an　adhesive　and　template　(SNP@PDA@FPUF).　As　a　result,　these　FPUFs　show　outstanding　fire　safety　and　anti-dripping　capacity,　and　the　heat　release　rate　reduced　80.92%.　Furthermore,　the　amounts　of　carbon　oxide　(CO)　and　carbon　dioxide　(CO2)　decreased　75.01%　and　22.4%,　respectively.　Above　all,　the　EMI　shielding　effectiveness　(SE)　accomplished　almost　120　dB　as　the　increasing　electroless　time　with　a　low　density　of　0.051　g/cm3.　Furthermore,　the　specific　EMI　SE　(SSE)　and　the　absolute　EMI　SE　(SSE/t)　accomplished　2630.98　dB·cm3/g　and　2434　dB·cm2/g,　respectively,　which　was　far　beyond　the　commercial　request.　Therefore,　this　work　may　provide　a　facile　way　to　prepare　low　density　and　EMI　shielding　products　with　high　fire　safety　for　next　generation　electronic　products.　©　2021　Elsevier　Inc.