The invention discloses an environmentally friendly flame-retardant fabric compound for motor vehicle interior decoration and a preparation method thereof, comprising a motor vehicle interior environment-friendly flame-retardant fabric and a flame-retardant lining, the two are compounded by flame, flame-retardant glue or flame-retardant heat Melt-adhesive compounding achieves tight bonding. The environmentally friendly flame-retardant composite fabric for motor vehicle interiors has dry cloth surface, green environmental protection, low smoke and less toxicity, low VOC, low atomization value, no peculiar smell, soft hand feeling, excellent flame-retardant performance, high peel strength, good resilience, Good antistatic performance and other characteristics, can be widely used in seats, safety seats, ceilings, door panels, handrails, etc.