The invention discloses a halogen-free expansion type flame-retardant glass fiber reinforced polypropylene material. The polypropylene material is prepared from the following ingredients in percentage by mass: 40%-74% of polypropylene resin, 15%-30% of halogen-free expansion type flame retardant, 0%-6% of flame-retardant synergist, 5%-30% of glass fiber, 0%-20% of filling agent, 5%-15% of compatilizer, 0.2%-0.6% of nucleating agent, 0.3%-1% of antioxidant and 0.5%-2% of lubricating agent. According to the flame-retardant glass fiber reinforced polypropylene material disclosed by the invention, as the quantity of addition of the halogen-free flame retardant is little, the flame-retardant effect is good; and the compounded flame-retardant synergist does not affect the performance of the resin, the flame-retardant performance of the material is improved, the cost can be lowered, no precipitation exists on the surface of the compounded flame-retardant product in long-term storage, so thatthe defect that precipitation exists on the flame-retardant product in long-term storage is overcome, and the advantages of no halogen, environmental friendliness, excellent performance and long-termworkability are achieved.