Provided is a method for performing anaerobic digestion by utilizing a heavy metal ion enriched biomass waste material, comprising: putting a biochar made from the raw materials such as garden rubbish and agricultural and forestry waste, or a plant for adsorbing heavy metal ions in waste water containing heavy metal ions, and obtaining a heavy metal saturated biochar or a heavy metal super-enriched plant; and then adding in a kitchen waste anaerobic digestion methane generation system at a certain ratio. The heavy metal ions adsorbed in the plant or the biochar are utilized as a basic component of an anaerobic reaction enzyme to promote the growth of methane bacteria, activate the activity of the enzyme, shorten the time of a hydrolysis acidification stage, reduce VFA accumulation, and accelerate the generation of energy products such as methane and the like.
