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To meet the demand of power head for high power deep hole directional equipment, the double motor power head was developed by combining theory with field test. The key technologies of double motor power head, such as chuck, box and brake device were studied, and the industrial test was carried out in Sihe Mine of Jincheng Anthracite Mining Group. A drill hole with a depth of 1 881 meters was completed to verify the performance and reliability of the double motor power head and meet the needs of high power deep hole directional drilling rigs.