NOVELTY - Wastewater degradation system comprises a high temperature anaerobic digestion reaction unit (B) for degrading nitrosodimethylamine in waste water so as to produce marsh gas and biogas slurry, and is provided with a marsh gas outlet, a biogas outlet and a raw liquid inlet; a high efficiency heat energy recycling device (A), comprising multiple heat exchange units set with a discharge fluid flow channel and a thermal insulation unit; a power generating device (D) comprising a biogas generator and a heating pipe; and an electro-catalysis oxidation reaction unit (C).    USE - Used as a wastewater degradation system.    ADVANTAGE - The system has high efficiency and saves energy (claimed); does not require other external energy consumption for heating, and provides electric energy for electric catalytic oxidation degrading; is integrated and can operate continuously; has high automation degree; and can greatly save land resource.    DETAILED DESCRIPTION - Wastewater degradation system comprises a high temperature anaerobic digestion reaction unit (B), which is used for degrading nitrosodimethylamine in waste water in high temperature environment so as to produce marsh gas and biogas slurry, and is provided with a marsh gas outlet, a biogas outlet and a raw liquid inlet; a high efficiency heat energy recycling device (A), comprising multiple heat exchange units and a thermal insulation unit. The thermal insulation unit is connected with multiple heat exchange units so that multiple heat exchange units are separated and independent of thermal insulation. The heat exchange unit is set with a discharge fluid flow channel and a heating flow passage. Each two adjacent heat exchange unit is provided with a first connecting channel and a second connecting channel. The first channel is connected with two adjacent heat exchange unit to discharge fluid flow channel. The second channel is connected with two adjacent heat exchange unit for heating fluid passage so as to fix the multiple heat exchanging units are connected in series. The exhaust fluid flow passage and a connecting passage are composed of biogas slurry channel. The heating fluid flowing channel and the second connecting channel is composed of a raw liquid passage. One end of liquid channel of biogas slurry outlet, one end of liquid channel of sewage source, the discharge fluid passage and heating fluid sewage flow passage enter heat exchanger to exchange heat so as to heat water; a power generating device (D) comprising a biogas generator and a heating pipe, where the biogas generator is connected with the biogas outlet by biogas power generation, the heating pipe is connected with raw liquid channel and raw liquid inlet, and the other end of biogas slurry is connected to the biogas generator; and an electro-catalysis oxidation reaction unit (C) receives the biogas produced by the generator for generating electricity to degrade biogas slurry.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the wastewater degradation system (Drawing includes non-English language text).    Heat energy recycling device (A)    High temperature anaerobic digestion reaction unit (B)    Electro-catalysis oxidation reaction unit (C)    Power generating device (D)