NOVELTY - Biological treatment method of food waste, involves pre-treating food waste or high-concentration organic sewage, removing grease from the pre-treated product, hydrolyzing and acidizing the obtained product, and carrying out anaerobic digestion treatment, where at least three-grade anaerobic digestion reactor is used in anaerobic digestion treatment process and super high temperature anaerobic digestion method is used for the anaerobic digestion process.    USE - The biological treatment method is useful for food waste produced from restaurants and mess halls, and high-concentration organic sewage produced from industrial and agricultural production processes.    ADVANTAGE - The treatment system has compact and simple structure, requires less investment, small occupied area and has excellent waste biological treatment effect, social and economic benefits.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for biological treatment system, which comprises at least three-grade or more anaerobic digestion reactor, where the systematic engineering uses embedded design, reactor is arranged under ground. The anaerobic digestion reactor comprises super high temperature hydrolyzing and acidizing reactor, high temperature methane producing reactor, biogas residue storing and insulating reactor, and biogas liquid storing and insulating reactor. The super high temperature hydrolyzing and acidizing reactor is provided with pre-treated food waste inlet, and flowing window is arranged at the bottom of blocking wall shared by the super high temperature hydrolyzing and acidizing reactor and the high temperature methane producing reactor, and communicates with the high temperature methane producing reactor, material conveying tube is arranged between the high temperature methane producing reactor and biogas residue storing and insulating reactor, overflow outlet is arranged on the upper portion of the biogas residue storing and insulating reactor and communicates with the biogas residue storing and insulating reactor, heater is arranged in the super high temperature hydrolyzing and acidizing reactor and the high temperature methane producing reactor and is connected with thermodynamic system through tube, insulating layer is arranged on the upper and lower walls of each digestion reactor, and biogas exhaust tube port is arranged on the top of the high temperature methane producing reactor and the biogas residue storing and biogas liquid insulating reactor and communicates with the cavity on the upper portion of the liquid level.