The invention discloses a high-temperature aging-resistant flame-retardant polypropylene material for bellows and a preparation method thereof. The flame-retardant polypropylene material is composed of copolymerized polypropylene, a brominated flame retardant, an antimony-based flame It is composed of effect agent, silicone masterbatch, halogen absorber, antioxidant and toughening modifier. The preparation method is very simple. First, the components are fully mixed in batches, and then extrusion, cooling, drawing, Finely dice. The flame-retardant polypropylene material of the present invention has a good flame-retardant effect, and the flame-retardant grade can reach UL94 V-2 level, or even V-0 level, has good high-temperature aging resistance, and can be baked at 150°C for 360 hours without brittle cracking , Stable processing performance, continuous production, laser engraving, smooth surface without graininess, no precipitation of flame retardant, good hand feeling of extruded bellows, not easy to squeeze and burst.