An earthworm reactor comprises a main body frame and multilayered reactor box bodies located in the main body frame. A bottom plate is arranged at the bottom of each layer of the main body frame, and the reactor box body is movably arranged on the bottom plate of each layer; an aerator pipe and a filtrate collecting pipe are arranged in the reactor box body of each layer; an aerating air supply pipe connected to the aerator pipe of each layer and a filtrate centralizing pipe connected to the filtrate collecting pipe of each layer are separately arranged on one side of the main body frame; the aerating air supply pipe is connected to an external aerating device and the bottom of the filtrate centralizing pipe is connected to an external liquid storage tank.
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