Abstract: From the evaluation feature extraction methods and coupling relation model of coal cutters safety, this paper researches coal cutter safety evaluation methods and carries out correlation analysis about the information of coal cutter operation and maintenance, and determines the features of safety analysis for coal cutter. For the distribution statistics laws of discrete data properties or among discrete data properties, using Boolean algebra dot product operation, the correlation among projects is solved, and the coupling relation model of safety evaluation for coal cutter is established. The effectiveness of model is verified through the leasing, maintenance and repair information of nearly 12 years of large coal cutters in Shendong Coal Equipment Management Center and production units.