Coal water mixture (CWM) needs to be produced from pulverized coal to reduce the cost of its production. However, the pulverized coal produced by a dry crushing process is strongly hydrophobic, which makes it difficult to mix coal and water. Preliminary tests confirmed that coal particles are easily wetted after removing the air adhering to the surface use of a vacuum. This paper proposes technology of improve the hydrohilicity of the coal particle surface. This technology involves removal of the air adhering to the surface of the coal particle by using an air mixed jet pump and wetting the coal particle with a jet of water. The performance of the proposed method was investigated by experiments with Wark-Worth coal. The result showed that the hydrophilicity of the coal surface is improved and the coal and water can be mixed within a few hours. The viscosity of the CWM produced by the proposed method is 900 mPa.s at the coal concentration of 70%, which is similar to that of the CWM produced by the conventional wet ball mill process.