The invention discloses a multi-layer composite environment-friendly flame retardant sound-insulating coiled product. The multi-layer composite environment-friendly inflaming retardant sound-insulating coiled product is formed by alternately overlaying and compounding a material A and a material B, wherein the material A comprises the following components in part by weight: 100 parts of PVC (Polyvinyl Chloride), 10-25 parts of an environment-friendly plasticizer, 25-50 parts of a filler, 3-10.5 parts of a flame retardant smoke-suppression agent, and 10-17 parts of an accessory ingredient, the material B comprises the following components in part by weight: 100 parts of PVC, 20-45 parts of an environment-friendly plasticizer, 25-45 parts of a filler, 3-10.5 parts of a flame retardant smoke-suppression agent, 0.5-5 parts of a foaming agent and a modifier, and 10-17 parts of an accessory ingredient. The sound-insulating coiled product disclosed by the invention has the advantages of being high in sound-insulation, low in density, flame retardant, non-toxic and environment-friendly, good in flexibility, great in strength, capable of performing dry construction and few in occupied space, and not affecting the indoor decorative effect.