NOVELTY - Treating polytetrahydrofuran industrial wastewater, comprises e.g. introducing wastewater into the oil isolating tank to separate polytetramethylene ether glycol and petroleum matter, then introducing obtained sewage into an air flotation adjusting tank to homogenize water quality and quantity, feeding the sewage to a reaction tank of the combined air flotation device and adding powdered activated carbon and polyacrylamide to process coagulation reaction, then adding it into an UASB reactor for acidifying and methylating, then adding discharged water into an aerobic adjusting tank to process.    USE - The method is useful for treating polytetrahydrofuran industrial wastewater.    ADVANTAGE - The method: treats non-soluble organic matter and high-concentration high-molecular annular organic matter; and has less investment, fast effect, stable discharged water quality, and convenient management and operation for realizing complete automatic control.    DETAILED DESCRIPTION - Treating polytetrahydrofuran industrial wastewater, comprises introducing polytetrahydrofuran industrial wastewater into an oil isolating tank, then collecting polytetramethylene ether glycol (PTMEG), acetylene carbon black particle, scum and petroleum matter floated on liquid surface into a collecting tank by an oil skimmer of the oil isolating tank, and adding them into an incinerator or boiler, then introducing sewage obtained from the oil into the air flotation adjusting tank to homogenize the water quality and water quantity, where a paddle-type stirring machine is arranged in the air flotation adjusting tank to stir the mixture continuously, and an air flotation adjusting tank lifting pump mixes the sewage with an alkali liquid of an alkali liquid storage feeding device through a pipeline mixer, and then feeding the sewage to a reaction tank of a combined air flotation device, then adding powdered activated carbon (PAC) and polyacrylamide (PAM) of the PAC and PAM feeding systems to the reaction tank to process coagulation reaction, and introducing discharged water into the combined air flotation device, where soluble-air water released from the combined air flotation device feeds a residue PTMEG, acetylene carbon black particle, scum and petroleum matter to the liquid surface of the combined air flotation device and the matter is removed through a scraping machine, then adding the matter to the collecting tank, and introducing the air flotation discharged water into an anaerobic adjusting tank, where the anaerobic adjusting tank is provided with a pH online monitor for monitoring quantity of the alkali liquid, then the wastewater is added to an upflow anaerobic sludge blanket (UASB) reactor through an anaerobic lifting pump for acidifying and methylating the wastewater to flow into an aerobic adjusting tank, where the UASB reactor is provided with a pH meter and a thermometer for controlling the pH within 6.5-7.2 and the temperature to 30-38 degrees C, and residual sludge of an upflow anaerobic sludge blanket (UASB) reactor is treated in a sludge collecting tank, adding methane gas generated by a UASB reactor to a torch to combust, then introducing low-concentration organic wastewater including domestic sewage, rainwater, ground washing water and machine sealer cooling water of the polytetrahydrofuran device area and office area into the mechanical grid for removing floater and silk matter through the mechanical grinding machine, then passing the organic wastewater into a water collecting well provided with a submersible stirring machine, then introducing the wastewater into the aerobic adjusting tank through a water collecting well lifting pump and is mixed with discharged water of the UASB reactor, where the submersible stirring machine is arranged in the aerobic adjusting tank for homogenizing the water quality, and a chemical oxygen demand (COD) online monitor is arranged in the aerobic adjusting tank, then adding the sewage of the aerobic adjusting tank to the anaerobic adjusting tank when the COD is larger than 1000 mg/l, where the aerobic adjusting tank feeds the wastewater to the aerobic mixing tank of the aerobic biochemical treatment system to mix with the sludge refluxed by a sludge well, then introducing the wastewater into an anoxic A tank to process hydrolysis acidification and denitrification reaction at anoxic environment, where the submersible stirring machine is arranged in the anoxic A tank, the sewage enters the aerobic O tank, the sewage is pushed in the aerobic O tank to process metabolism continuously with micro-organism of each area to degrade organic matter (COD/biological oxygen demand), then adding discharged water to the aerobic moving bed biofilm reactor (MBBR) tank to process biochemical treatment, adding discharged water to the secondary sedimentation tank to separate solid and liquid, where the secondary sedimentation tank is provided with the sludge well, the sludge of the sludge well is refluxed and the refluxing quantity is 50-100%, storing the residual sludge in the sludge collecting tank and dehydrating the sludge by pressing and filtering machine to dry, passing the filtrate into the aerobic adjusting tank, and introducing the discharged water of the secondary sedimentation tank into the monitor tank and is monitored by the COD online monitor of a protection tank, and then discharging the water when the COD reaches the standard and the emission reaches the standard or again adding the water to the anaerobic adjusting tank or the aerobic adjusting tank through the monitor pump if the COD exceeds standard.