The invention belongs to the technical field of multi-grade treatment of water, wastewater or sewage and in particular discloses an emulsified liquid treatment technology. The emulsified liquid treatment technology comprises the following treatment steps: (1) collecting: collecting used emulsified liquid; (2) precipitating: precipitating the collected emulsified liquid by utilizing a precipitation tank; (3) carrying out acid precipitation: introducing the emulsified liquid subjected to precipitation treatment into an acid precipitation tank; (4) carrying out flocculation: adding a flocculating agent into the emulsified liquid subjected to the acid precipitation and carrying out the flocculation on the emulsified liquid; (5) carrying out press filtering: introducing the emulsified liquid subjected to the flocculation into a filter press and carrying out the press filtering; (6) evaporating: introducing the emulsified liquid subjected to the press filtering into an MVR (Mechanical Vapor Recompression) evaporator and carrying out sectional type evaporation; (7) separating: introducing the evaporated emulsified liquid into a separator and standing and separating to carry out layering. Compared with the prior art, the treatment technology provided by the invention is simple to operate and can be used for rapidly separating water and oil from the emulsified liquid and directly putting the water and the oil into use.