NOVELTY - Urine wastewater treatment device comprises a reaction system, an analyzing and detecting system, and a course control system. The reaction system includes a nitration reactor (1), a denitrification reactor (2), a urinary tank (3), an air supply device (4), a nitrate nitrogen wastewater collector (5) and a reverse osmosis device. The analyzing and detecting system comprises an analyzing and detecting system A, and an analyzing and detecting system B. The analyzing and detecting system A comprises a pH sensor A, a dissolved oxygen sensor A and a temperature sensor A.    USE - The device is useful for space life support system.    ADVANTAGE - The device consumes less energy; has high concentration of treating the urine wastewater; recycles nitrogen in a short treating period; and ensures high safety. The device and the method provides oxygen.    DETAILED DESCRIPTION - Urine wastewater treatment device comprises a reaction system, an analyzing and detecting system, and a course control system. The reaction system includes a nitration reactor (1), a denitrification reactor (2), a urinary tank (3), an air supply device (4), a nitrate nitrogen wastewater collector (5) and a reverse osmosis device. The analyzing and detecting system comprises an analyzing and detecting system A, and an analyzing and detecting system B. The analyzing and detecting system A comprises a pH sensor A, a dissolved oxygen sensor A and a temperature sensor A. The analyzing and detecting system B comprises a pH sensor B, a dissolved oxygen sensor B and a temperature sensor B. The course control system comprises an exhausting valve A, an exhausting valve B, an airflow meter, a pump, an automatic control valve A, an automatic control valve B, a heating sleeve A, a heating sleeve B, an acid and a base adding device A, and an acid and a base adding device B. The nitration reactor is provided with a mixing device A. The bottom of the nitration reactor is provided with an aeration device. The denitrification reactor is provided with a mixing device B. The water inlet of the nitration reactor is located on the upper part of the mixing device B, and the water outlet is located at the lower part of the mixing device B. The nitration reactor is provided with a mixing device A. The bottom of the nitration reactor is provided with the aeration device. The inner side of the nitration reactor is provided with the analyzing and detecting system A and the outer side is provided with the heating sleeve A, and the top is provided with an air outlet. The exhaust valve A is located above the air outlet. The top of the nitration reactor is connected to the acid and the base adding device A by a pipeline. The water inlet of the denitrification reactor is located on the upper part, and the water outlet is located at the lower part. The denitrification reactor is provided with a mixing device B and the analyzing and detecting system B, and the outer side is provided with the heating sleeve B. The top of the denitrification reactor is provided with an air outlet above which the exhausting valve B is located. The top of the denitrification reactor is connected to the acid and base adding device B by the pipeline. The microbes are inoculated into the nitration reactor and the denitrification reactor. The urinary tank is connected to the water inlet of the nitration reactor by the pipeline. The water outlet of the nitration reactor is connected to the water inlet of the nitrate nitrogen wastewater collector by the pipeline. One water outlet of the nitrate nitrogen wastewater collector is connected to the water inlet of the denitrification reactor and the other water outlet is communicated on the outer side. The water outlet of the denitrification reactor is connected to the water inlet of the reverse osmosis device by the pipeline. The water outlet of the reverse osmosis device is communicated with the outer side. The air supply device is connected to the aeration device at the bottom of the nitration reactor by the pipeline. The pipeline connecting the urinary tank and the water inlet of the nitration reactor is provided with a pump. The pipeline connecting the water outlet of the nitration reactor and the water inlet of the nitrate nitrogen wastewater collector is provided with an automatic control valve A. The pipeline connecting the water outlet of the denitrification reactor and the water inlet of the reverse osmosis device is provided with an automatic control valve B. The pipeline connecting the air supply device and the aeration device at the bottom of the nitration reactor is provided with an airflow meter. The mixing device A and the mixing device B are independent stirring reactor, a fluidized bed reactor or a fixed bed reactor. INDEPENDENT CLAIMS are also included for:    (1) treating urine wastewater comprising: (a) diluting the urine wastewater for more than 10 times, and pumping to the nitration reactor, and (b) passing the air or oxygen to the aeration device at the bottom of the nitration reactor by the air supply device, supplying oxygen to the nitration reactor, and treating by microbe in the nitration reactor to obtain the nitrated nitrate nitrogen wastewater; and    (2) enriching and domesticating microbes for treating urine wastewater, comprising (i) placing the aerobic active sludge at pH 7-8.5, the concentration of the dissolved oxygen is 2-4 mg/l, and at 25-30 degrees C, moving the urine wastewater diluted for 50 times, and reducing the dilution time continuously till the urine waste water is obtained and is diluted for 10 times, enriching and domesticating the microbes in the aerobic active sludge till the nitrated nitrate nitrogen conversion rate namely the ratio of the nitrated nitrate nitrogen to the urine in the wastewater is drained from aerobic active sludge is more than 95%.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of the urine in wastewater treatment device.    Nitration reactor (1)    Denitrification reactor (2)    Urinary tank (3)    Air supply device (4)    Nitrate nitrogen wastewater collector (5)