The invention discloses a polypropylene resin blend, which is prepared with polypropylene, polyethylene, vinyl co-polymer rubber, talcum powder, polypropylene and anti-oxidant. Compared to the existing technology, the polypropylene resin blend has excellent balance of rigidity and toughness, the low temperature notch impact strength is greatly higher than the general polypropylene composite materials, the crystallization rate is fast and crystal form is controllable, the period of injection molding is short, and there is no tiger skin veins on the surface of the injection molding articles, the heat resisting and oxidation susceptibility is excellent, can be processed in the higher molding temperature (higher than 240 Celsius system), therefore the adjusting range of this technology is large, and can be recovered many times. The blend is especially suitable for preparing instrument board of ensconcing safety airbag, the tensile strength of the blend is more than 20MPa, bend strength is more than 30MPa, the IZOD notch impact strength is more than 15KJ/m2 at the temperature of subzero 30 Celsius system.