The utility model provides an air conditioner fan special for a pig farm. The air conditioner fan comprises a water supplying system and a water curtain wind-exhausting system, wherein the water supplying system comprises a water box, a water pump, a water temperature electronic adjusting device, a water level pipe, a water box water inlet pipe, and a water box water outlet pipe. The water curtain wind-exhausting system comprises a water curtain top tank, a water curtain, a water curtain base, a fan, a wind blade, a fan fixing rod, a bearing, a control panel, a support, a water curtain water inlet pipe, and a water curtain water outlet pipe. One end of the fan fixing rod is connected with the fan, the other end of the fan fixing rod is fixed on the water curtain base, and the water curtain base is connected with the support through the bearing. Water in the water box is pumped into the water curtain top tank through the water pump, and flows to the water curtain base through the water curtain, and water flow flows back the water box through the water curtain water outlet pipe under the water curtain base. In summer, the air conditioner fan special for the pig farm has functions of preventing sunstroke, lowering temperatures, and reducing density of harmless gas in a pig house such as ammonia gas. In winter, the air conditioner fan special for the pig farm has functions of preserving heat, alleviating influence to the density of the harmless gas in the pig house such as the ammonia gas, and ensuring food security of pig raising production.