Air cathode for microbial fuel cell and microbial fuel cell

The utility model provides an air cathode for a microbial fuel cell and the microbial fuel cell, and relates to the technical field of microbial fuel cells. The cathode comprises a tubular column withan opening in the top, water-absorbing hydrogel and a conductive porous ceramic ring, wherein the water-absorbing hydrogel and the conductive porous ceramic ring are arranged in the tubular column; the pipe column comprises an upper half part and a lower half part, and a plurality of first small holes are formed in the pipe wall of the lower half part; the water-absorbing hydrogel is filled in the tubular column, and the conductive porous ceramic ring is located at the upper half part and surrounded by the water-absorbing hydrogel; and the wire is wound on the conductive porous ceramic ring,penetrates through the middle channel of the conductive porous ceramic and extends out of the opening of the tubular column. The air cathode for the microbial fuel cell and the microbial fuel cell provided by the utility model