The grain size and petrological and mineralogical characteristics of clasticrocks are good indicators of physiogeographic setting, hydrodynamic conditions,source of sediments and parent rock region during deposition. Therefore, theanalysis of grain size and rock and mineral data is an important part of clasticsedimentological study. Base on the grain size database and rock and mineraldatabase, the grain size histograms, cumulative curves, probability plot and CMdiagram as well as rock and mineral diagrams have been compiled. The grain sizeparameters have been calculated. The authors recommend the methods of estab-lishing the discriminant function and judging sedimentary environments with grainsize parameters.