Novel application method of kitchen refuse as resource for ecological cycle aquaculture

The invention relates to a method for cultivating fish via kitchen waste, which comprises dewatering kitchen waste, while it content is lower than 70%, and selecting metal foreign matters via magnetic method; boiling and disinfecting, to evaporate the water more then 60%, extracting liquid grease; drying and breaking solid to make into forge; recycling the waste slag liquid as marsh gas to supply heat; using waste gas recycle heating technique to support fish cultivation; and recycling clean condensed water to support fish cultivation.