NOVELTY - A water-sorting resource, harmlessness and natural-derivation recycling eco-system of municipal domestic wastes adopts the principles comprising buoyancy, kinetic energy, potential energy, flow velocity, Raynaud's phenomenon, siphon, gravity and the like to clean and sort the wastes and allows the sorted kinds to harmlessly enter a recycling channel, where sorted sewage and decomposable organic matters enter a system of a biological flocculation technology, a biomass anaerobic technology and a biomass aerobic technology to generate a high-quality biomass energy-biogas.    USE - The system is useful in electro-adsorption process for removing waste in battery damage caused by heavy metal, and for preventing micro-heavy metal caused by quality harm to the subsequent organic fertilizer (claimed).    ADVANTAGE - The agricultural production is pollution-free for real green product; and can improve the soil hardening; can realize ecological chain circulation to realize the complete waste; and can change waste into valuable.    DETAILED DESCRIPTION - A water-sorting resource, harmlessness and natural-derivation recycling eco-system of municipal domestic wastes adopts the principles comprising buoyancy, kinetic energy, potential energy, flow velocity, Raynaud's phenomenon, siphon, gravity and the like to clean and sort the wastes and allows the sorted kinds to harmlessly enter a recycling channel, where sorted sewage and decomposable organic matters enter a system of a biological flocculation technology, a biomass anaerobic technology and a biomass aerobic technology to generate a high-quality biomass energy-biogas, so the utilization of regenerated energy is excavated; where the obtained biogas residues and the biogas slurry can be mixed with the sorted rubber overshoes, chemical fibers, cotton fibers and carbonized particles obtained through carbonization of rural straws in an anoxic low-temperature cracking carbonization furnace, and the obtained mixture can be used as a high-efficiency organic slow release fertilizer used in the agriculture, so pollution-free real green products can be produced in the agriculture, and the soil hardening can be improved, thus substances from the nature return to the nature, ecological chain cycle is realized, the complete resource utilization of the wastes is realized, and the wastes are changed into valuables.