Abstract: Components,variation tendency and main influence factor of methane in 11223 mining face of Jinjia Colliery was discussed by analyzing drainage and ventilation methane data. Results showed that when mining lower protective seam in near-distance coalseams,methane discharge was mainly from near coal. Special methane drainage roadway and air-return pipe drainage should be preferentially considered when selecting methane prevention method. Buried depth,methane content,mining speed,roof weighting had distinctly influence on methane discharge. Mines should adopt methane prevention measures on the basis of own conditions.