NOVELTY - A livestock and poultry biogas slurry purifying device has an adjusting tank (1), a contact oxidizing tank (2), a flocculating settling tank dosing zone (3), a reaction zone (4) and a settling zone (5), an iron-carbon micro-electrolysis tank and a disinfecting clarification tank (7) that are arranged in sequence, where the adjusting tank is connected with the contact oxidizing tank, the flocculating settling tank dosing zone and the iron-carbon micro-electrolysis tank by a water inlet pipe (13). The contact oxidizing tank is equipped with an aerating apparatus (12) that supplies oxygen.    USE - Device for purifying livestock and poultry biogas slurry.    ADVANTAGE - The device can remove part of organic matter degraded by organisms in biogas by aerobic treatment while removing ammonia nitrogen, and can remove large part of suspended solid matter and hardly degraded organic matter by performing flocculating settling and microelectrolysis.    DETAILED DESCRIPTION - A livestock and poultry biogas slurry purifying device has an adjusting tank (1), a contact oxidizing tank (2), a flocculating settling tank dosing zone (3), a reaction zone (4) and a settling zone (5), an iron-carbon micro-electrolysis tank and a disinfecting clarification tank (7) that are arranged in sequence, where the adjusting tank is connected with the contact oxidizing tank, the flocculating settling tank dosing zone and the iron-carbon micro-electrolysis tank by a water inlet pipe (13). The adjusting tank is provided with a control valve (14). A water pump (9) is mounted between the flocculating settling tank dosing zone and the iron-carbon micro-electrolysis tank. The contact oxidizing tank is equipped with filler and an aerating apparatus (12) that supplies oxygen. An INDEPENDENT CLAIM is also included for a method for purifying livestock and poultry biogas slurry.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a livestock and poultry biogas slurry purifying device.    Adjusting tank (1)    Contact oxidizing tank (2)    Flocculating settling tank dosing zone (3)    Reaction zone (4)    Settling zone (5)    Disinfecting clarification tank (7)    Water pump (9)    Aerating apparatus (12)    Water inlet pipe (13)    Control valve (14)