This system adopts the following process: After kitchen waste is classified, crushed, squeezed and dehydrated, it is put into the tank from the loading port of the fermentation tank through the conveying system; then, a certain amount of aerobic bacteria is added, and the mixing system, heating system and ventilation system are activated to allow the waste to quickly undergo optimal aerobic fermentation under the established environment. After 4 to 6 days of efficient fermentation, the waste is finally decomposed into organic fertilizer.