The invention discloses an activation method for improving the performance of an adsorbing material in storage of natural gas. The method comprises four steps, including baking, acid treatment, alkali treatment and salt treatment, wherein hydrochloric acid, nitric acid and hydrofluoric acid are used for preparing an acid solution of which the concentration is 0.5mol/L to 2.0mol/L; sodium hydroxide, potassium hydroxide and ammonium hydroxide are used for preparing an alkaline solution of which the concentration is 0.5mol/L to 2.5mol/L; sodium chloride, potassium chloride, ammonium chloride, sodium sulfate, ammonium sulfate, sodium nitrate and ammonium nitrate are used for preparing a salt solution; the acid solution, the alkaline solution and the salt solution are respectively used for activating the adsorbing material which is baked at the temperature of 300-890 DEG C. The method disclosed by the invention can be used for producing a high-efficiency natural gas adsorbing material which is high in specific surface area, high in natural gas storage capacity, good in adsorption and desorption performance and long in service life.