Abstract: The pore-fracture system, permeability of the coal reservoir and the heterogeneity of the pore-fracture system and permeability are very important aspects of the coal reservoir evaluation ．The permeability of the coal reservoir depends on the pore-fracture system of the coal reservoir，an d the pore-fracture system of the coal reservoir depends on coal rank，coal lithotypes and maceral． In a small districts， the coal rank is usually stable or changes regularly， the permeability of the coal reservoir is mainly related to the coal lithotypes and maceral．The coal lithotypes，organic maceral，minerals depend on environment during the peat formation．The evaluation an d forecasting of the pore-fracture system an d permeability of the coal reservoir may be carried out by coal facies analysis，in which the important contents are coal maceral，structure of maceral，sequence of coal lithotypes an d parting