The invention discloses a domestic rubbish disposal system. A plate feeder feeds materials to a roller screening machine through a material uniformizing device. Light rubbish and heavy rubbish are separated out from oversize matter on the roller screening machine through a negative-pressure winnowing machine, the heavy rubbish passes a magnetic separation conveying machine and then enters a building rubbish breaking machine to be smashed, the light rubbish is conveyed to a bag breaking machine through a bin type conveyor to be subjected to bag breaking, the rubbish matter with the diameter being larger than the sieve pore diameter forms oversize mixtures, and undersize matter with the diameter being smaller than the sieve pore diameter is conveyed to a material grinding mill to be smashed; and undersize matter on the roller screening machine enters the material grinding mill to be smashed and broken up, the smashed undersize rubbish enters a light-weight roller screening machine to be classified into small blocks of oversize mixtures and undersize muck, and the undersize muck serves as a raw material for manufacturing environmental-friendly fertilizer or a paving base material to be output. By the adoption of the domestic rubbish disposal system, the type of sorted materials is subdivided, the recycling rate of materials of the sorted plastic, building rubbish, muck, waste batteries, glass and the like is high, and the domestic rubbish disposal system can be used for disposal of other rubbish and is more suitable for disposal of rural domestic rubbish.