The invention discloses a household garbage crushing sorting system. The sorting system consists of a quantitative feeding device, a magnetic separation device, a gravity gradient sorting device, a pendulum type crushing device, an air separation device, a needle selection device and a material conveying device. The sorting system is compact in structure, can achieve continuous production, is high in production efficiency, simple to operate, safe and reliable, and can divide urban household garbage into decayable organic matter, combustible wastes, metal, glass and light recoverable matter, so that the urban household garbage can be sufficiently utilized as a resource, and the sorting system has very high environmental benefit and social benefit simultaneously.