Abstract: In order to solve problems of serious working environment, poor safety and high labor intensity existed in thin seam mining, a data record and statistic m ethod were applied to the trial analysis on ploughing method of the coal plough, feeding technology, optimum ploughing parameters, automatic operation condition and service life of easily- worn parts. The study results showed that a complete BH38 12 x400 automatic plough equipment could meet the requirements of a thin seam mini ng. Based on the circumstances, an industrial trial was conducted. The trial results showed that the complete equipment could meet the requirements of the thin seam mining, the automatic operation and remote centralized control system of the coal plough with a reliable stability. A safety and high efficient automatic mining with a mini ng heightof0. 9~ 1.7 m was realized in a thin seam with a Protodyakonov coefficient over 3.