In order to prepare simple and environmentally friendly oil-water separation materials, superhydrophilic composite membrane (TAPE) was prepared by simple impregnation method with natural polyphenol tannic acid (TA) and polyethylene glycol (PEG) as raw materials and polyvinylidene fluoride (PVDF) membrane as substrate. The TAPE film was characterized by SEM, AFM, FTIR, XPS and contact angle instrument. The oil-water separation performance, wear resistance and stability of TAPE film were studied. The results show that the TAPE membrane has a porous micro-nano rough structure. When the TA content is 1.75 % of the mass of distilled water, the water contact angle and underwater oil contact angle of the membrane about 0° and 156°, respectively, showing superhydrophilicity and underwater superoleophobicity. Under the pressure of 0.09 MPa, the membrane flux of TAPE membrane for separating emulsified oil was 1146.4 L/(m2·h), which was 12 times that of the original PVDF membrane. The separation efficiency of oil-water mixture and emulsified oil could reach 99.9 %. In addition, the TAPE membrane has good stability, and the water contact angle of the membrane surface is still as high as 152° after 25 times of sandpaper detrition (320 mesh) under 100 g of loading. The membrane has potential application prospects in the field of oil-water separation.