NOVELTY - Preparation of pressed active carbon for separating methane and nitrogen gas through pressure swing adsorption, involves performing air preoxidation of coal, then mixing coal powder with (in weight%) coal tar (20-40) and water (5-20), shaping and drying the mixture, heating shaped coal in heating furnace with a increase in temperature of 5-15 degrees C per minute to reach 600-1000 degrees C in the presence of nitrogen, maintaining at constant temperature for 0.5-4 hours, and cooling the processed coal to room temperature, rinsing using water and drying to obtain pressed active carbon.    USE - The method is useful for preparing pressed active carbon for separating methane and nitrogen gas through pressure swing adsorption (claimed).    ADVANTAGE - The method prepares pressed active carbon by simple process, is inexpensive, and causes less pollution.    DETAILED DESCRIPTION - Method for preparing pressed active carbon for separating methane and nitrogen gas through pressure swing adsorption, involves (a) pulverizing coal powder into 160-200 meshes, (b) performing air preoxidation by adding the coal powder into a heating furnace and then placing the coal powder in air, heating the coal with a increase in temperature of 5-15 degrees C per minute to reach 300-450 degrees C, and maintaining at constant temperature for 0.5-2.5 hours, (c) adding (in weight%) coal tar (20-40) and water (5-20) to coal powder and mixing uniformly, (d) shaping the mixture into columnar particles with bottom diameter of 3-4 mm and height of 5-7 mm in a shaper, and drying shaped coal for 3-8 hours at 80-90 degrees C, (e) performing carbonization by putting the shaped coal into a heating furnace, heating with a increase in temperature of 5-15 degrees C per minute to reach 600-1000 degrees C in the presence of nitrogen, and maintaining at constant temperature for 0.5-4 hours, and (f) cooling the processed coal to room temperature, then rinsing using water, and drying to obtain pressed active carbon.