The invention relates to a method for separating and recycling chrome-contained oxide waste liquid produced by oxidation and decoloration of lignite wax, deresination lignite wax, peat wax or deresination peat wax, and the method is characterized by utilizing the reducibility of sulfur dioxide (SO2) to reduce hexavalent chromium with strong toxicity in the chrome-contained oxide waste liquid produced by the oxidation and decoloration processing process of the lignite wax, deresination lignite wax, peat wax or deresination peat wax to trivalent chromium with small toxicity, and then the oxidation reduction liquid containing the trivalent chromium and the sulfuric acid in the chrome-contained oxide waste liquid are separated and recycled through the filter and diffusion dialysis. During the reduction and separation process, no foreign ion impurity is introduced, no phase change exists, no secondary pollution is caused, simplicity and convenience in operation can be realized, the device is simple, energy conservation and high efficiency can be realized, no emission and no pollution on the environment exist, the reutilization of the resource can be realized, and the pollution problem of the chrome-contained waste liquid field can be effectively solved.