The invention relates to a preparation method for an ultra-oleophobic high-toughness ceramic membrane, and belongs to the technical field of environment protecting membrane separation. The method comprises the following steps: firstly using graphite powder as a raw material, processing to obtain oxidized powder, enabling the oxidized powder to mix with N-methyl pyrrolidone, and adding zirconium oxide, yttrium oxide and copper powder, adequately mixing to obtain suspension liquid, adding the suspension liquid to a sizing agent tank and preparing a prefabricated thin membrane, performing surfaceactivating treatment on the prefabricated thin membrane and preparing an ultra-oleophobic surface layer, finally placing in a muffle furnace, calcining at a high temperature to obtain the ultra-oleophobic high-toughness ceramic membrane. Graphite oxide is capable of reinforcing the mechanical property and the toughness of the ceramic membrane, and enhancing the lipophobicity of the ceramic membrane, thereby enabling an internal fiber structure of the ceramic membrane to be more compact, yttrium oxide and zirconium oxide are stable in chemical property, and chemical-corrosion-resistant, so theceramic membrane has the good toughness, the copper powder is introduced into the ceramic membrane, so a surface contact angle of the copper is remarkably increased, a surface energy is reduced, an ultra-oleophobic interlayer is formed, and a hydrophilic functional group is introduced for further improving the oleophobic effect, so the ultra-oleophobic high-toughness ceramic membrane has the extensive application prospect.