NOVELTY - Removal of carbon dioxide from natural gas comprises heating activated carbon material into reactor at 500-573 K by heating furnace to remove impurities, vacuumizing, decompressing valve of natural gas, flowing natural gas through reactor filled with activated carbon material, absorbing carbon dioxide and discharging natural gas, flowing inert gas through activated carbon material for desorption at room temperature to obtain the natural gas, and recycling active carbon material after desorption.    USE - Method for removing carbon dioxide from natural gas (claimed).    ADVANTAGE - The method reduces the content of the carbon dioxide in natural gas to 0.05 vol.%; and the volume of the processed natural gas is more than 1000 times of the activated carbon material.    DETAILED DESCRIPTION - Removal of carbon dioxide from natural gas comprises filling active carbon material into reactor, closing reactor and filling inert gas into reactor to wash reactor and pipes connected with each device, and heating active carbon material at 500-573 K by heating furnace to remove impurities; starting vacuum pump to vacuumizing reactor to 10-2 Pa, closing vacuum pump, starting molecular pump, vacuumizing to 10-5 Pa for 18-24 hours; starting gas decompressing valve of natural gas, flowing natural gas through reactor filled with activated carbon material at speed of 0.5-0.8 m/second under condition with the absorption pressure of 0.1-6.0 MPa and temperature of -15 degrees C to room temperature; absorbing carbon dioxide and discharging natural gas from which carbon dioxide has been removed, closing decompressing to finish absorption when detecting carbon dioxide content in discharged gas reacting to 0.1% in volume; and using pressure controller to decrease pressure to normal pressure, flowing inert gas through activated carbon material for desorption at room temperature to obtain the natural gas, and recycling active carbon material after desorption. An INDEPENDENT CLAIM is included for a preparation of the activated carbon microsphere material comprising adding additive (10-30 wt.%) comprising nano porcelain powder, metal oxide, silicon dioxide or carbonate into coal tar pitch, mixing uniformly, pre-oxidizing for 1-3 hours at 300-400 degrees C, maintaining temperature at 400-600 degrees C for 0.8-2 hours in presence of inert gas, mixing with strong alkali compound activator (300-900 wt.%), heating at 750-900 degrees C in activating furnace in presence of inert gas for 0.5-1.5 hours to obtain activated product, using cleaning agent to wash the activated product and drying to obtain activated carbon microsphere material.