The double axis mixer is rotated through two groups of screw shafts with spiral blade, and water is added water to the powder material for spraying wet mixing transportation, so that powdery material can achieve controllable humidity. The equipment is mainly suitable for humidification and mixing of raw materials in the fertilizer industry, so that the materials are fully mixing and this machine have the function of conveying too. When the quantity of raw material is poured into the mixing tank from the outlet, the raw material is atomized by a number of water with relative pressure, which is stirred by the mixing shaft of the qualitative length to form a uniform water-containing core. The whole agitation is divided into three areas: atomization area, mixing area and discharge area. The agitator leaves have well wear resistance and long service life.