Taking into account that oil generally hinders the adsorption performance of adsorbents, the purification of super-intricate wastewater containing abundant toxic cations, anions and oils is full of challenge. Based on the synergistic effects of layered titanate nanofibers (TNFs), oxygen vacancy occupied delta-Bi2O3 and surface carboxyl/hydroxy groups uniformly arranged cellulose, a layer-by-layer assembled nano-cellulose hydrogel coated flexible titanate-bismuth oxide membrane (CH-TBM) was developed for efficiently handling this sewage. The cellulose hydrogel top-layer with a pore size lower than 100m ensures the oil phase is resisted (oil contact angle > 150 degrees), while the water phase can easily and quickly permeate the membrane (water contact angle approximate to 0 degrees). And, the TNFs-Bi2O3 sub-layer with a pore size larger than 10m guarantees that the toxic anions/cations in the water are capable of efficiently being removed. The removal capacities of Cs+, I-, Cu2+, SeO42-, Pb2+, SeO32-, Sr2+ and Br- achieve 125.4, 225.9, 136.1, 85.1, 421.1, 204.5, 81.4, and 89.6 g g(-1), respectively. Significantly, CH-TBM with controllable shape also shows wide acid and alkali adaptation ranges, good recyclable, and simple post-processing method. Hence, the as-fabricated CH-TBM can be served as an excellent treatment agent for supercomplex sewage.