NOVELTY - Treatment of industrial oil-containing wastewater involves feeding wastewater to reservoir (1), transferring to oil separation tank (2), placing upper layer to oil storage tank, passing through fine grid (3), transferring to sedimentation tank (4), transferring to regulation tank (5), transferring to bacteria digestion tanks, adding sodium dihydrogen phosphate, dipotassium hydrogen phosphate and sodium chloride, transferring to aeration buffer tanks, transferring to sludge retention tank, transferring to membrane bioreactor with 0.2 mu m membrane pore size and 2 m3/hour flux and backwashing.    USE - Method for treating industrial oil-containing wastewater.    ADVANTAGE - The method is completely automated, and has 98.4% chemical oxygen demand removal rate, 97.6% ammoniacal nitrogen removal rate, 99.4% oil removal rate, 96.7% biochemical oxygen demand removal rate, 99.9% suspended solids removal rate, 98.6% total phosphorus removal rate and 97.2% anionic detergent removal rate.    DETAILED DESCRIPTION - Treatment of industrial oil-containing wastewater comprises feeding wastewater to reservoir (1), transferring to oil separation tank (2), placing upper layer to oil storage tank, passing through fine grid (3), transferring to sedimentation tank (4), transferring to regulation tank (5), transferring to bacteria digestion tanks, adding sodium dihydrogen phosphate, dipotassium hydrogen phosphate and sodium chloride, transferring to aeration buffer tanks, transferring to sludge retention tank, transferring to high temperature and pressure tank installed with thermometer, pressure sensor, flow meter, automatic temperature regulator, condenser, inductive coupling device, sump, valve, fan and stirrer, transferring to membrane bioreactor with 0.2 mu m membrane pore size and 2 m3/hour flux and backwashing.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of industrial oil-containing wastewater treatment system.    Reservoir (1)    Oil separation tank (2)    Fine grid (3)    Sedimentation tank (4)    Regulation tank (5)