Oily wastewater is always a threat to biological and human safety,and it is a worldwide challenge to solve the problem of disposing of it.The development of interface science brings hope of solving this serious problem,however.Inspired by the capacity for capturing water of natural fabrics and by the underwater superoleophobic self-cleaning property of fish scales,a strategy is proposed to design and fabricate micro/nanoscale hierarchicalstructured fabric membranes with superhydrophilicity and underwater superoleophobicity,by coating scaly titanium oxide nanostructures onto fabric microstructures,which can separate oil/water mixtures efficiently.The microstructures of the fabrics are beneficial for achieving high water-holding capacity of the membranes.