The utility model discloses a metal air fuel cell with a conical metal anode. The metal air fuel cell comprises a housing, a metal electrode, an air electrode, an upper electrolyte cavity and a lower electrolyte cavity, wherein a partition plate with a hole at the middle is arranged in the housing, the housing is divided into an upper part and a lower part by the partition plate, a plurality of air holes are formed on the side wall at the upper part of the housing, an electrolyte perfusion port is formed at the top of the housing, and a liquid discharge port is formed at the bottom of the housing; the metal electrode is arranged in the housing in the shape of an inverted cone; the air electrode is in the shape of a conical surface and opposite to the conical surface of the metal electrode; the upper electrolyte cavity is constituted by a gap between the metal electrode and the air electrode, and the lower electrolyte cavity is constituted by the partition plate and the lower part of the housing. The utility model provides the metal air fuel cell which has the advantages of easiness in removal of an anode precipitate, relatively long maintenance period and relatively low using cost. Compared with the prior art, the metal air fuel cell has the advantages of easiness in removal of the anode precipitate, relatively long maintenance period and relatively low using cost.