The invention relates to a household garbage and municipal sludge synergized recycling treatment process, and relates to the technical field of treatment of household garbage and municipal sludge. The household garbage and municipal sludge synergized recycling treatment process comprises the following steps: the household garbage is subjected to bag breakage, pulverization and water separation, and thus a mixture of sand and metal and a mixture of slurry and suspended matter are obtained respectively; the mixture of sand and metal undergoes magnetic separation, and thus sand particles and metal are obtained respectively; the mixture of slurry and suspended matter undergoes grid separation, and thus slurry and suspended matter are obtained respectively; then the slurry and the municipal sludge are mixed and are subjected to hydrolytic acidification; after filter pressing and dehydration, filter cakes and anaerobic hydrolysate are obtained respectively, and the filter cakes are burned, and the anaerobic hydrolysate is used for anaerobic fermentation so as to generate methane. The process does not generate secondary pollution, and the process is energy-saving.