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The fundamental relationship between microstructure,constituent,processing and performances of separating materials is really a vital issue.Traditional preparation methods for separation membranes are complex,time-consuming and easy to be fouled.Also,the durability of conventional coatings on membrane is poor.By combination of bioinspiration from mussel adhesive and fish scales' underwater superoleophobicity,we propose a general route to prepare organic-inorganic hybrid coatings,while no complex apparatus is needed.Specifically,based on the biomimetic adhesion of polydopamine (PDA),we used it as a binder to adhere TiO2 nanoparticles and built rough microstructure on fabric.In this way,we obtained TiO2-PDA treated fabric with special wettability.These TiO2-PDA treated samples owned superamphiphilicity in air,underwater superoleophobicity (underwater oil contact angles (OCAs)＞ 150°),underoil superhydrophobicity (underoil water contact angles (WCAs)＞150°),excellent multiresistance;and can separate polar/nonpolar liquid mixture effectively.It also owned superaerophobicity underwater (underwater bubble contact angles (BCAs)＞ 150°).The proposed TiO2-PDA coatings are highly expected to be employed for real situation of water pollution remediation,self-cleaning,oil extraction and harsh chemical engineering issues.