Abstract: The coal crushers currently used in domestic coal preparation plants are many and varied in kinds, which are predominantly of the sizing crusher, impact crusher, jaw crusher and hammer crusher. Analysis is made in the paper of the structural designs and working principles of the crushers in common use in coal preparation plants, with an aim to provide a basis for making optimal selection of crushers in plant design and upgrading of field crushing equipment. Following the analysis, the author goes to elaborate mainly on the way to make rational and correct selection of crushers according to such factors as raw coal property, size of coal cleaning plant and space of workplace.