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The paper introduced composition of plough mining system and application of technology of frequency-conversion speed-regulation in plough mining system. The application of technology of frequency-conversion speed-regulation improves efficiency of speed-regulation of driving system, realizes infinite speed-regulation of driving system, reduces vibrational loads of driving system of plough mining system in starting, solves exothermic problem causd by frequent start and commutating of driving motor of plough, and realizes really soft start. The technology improves driving reliability and working safety of plough mining system.