The invention discloses an emulsion flow optimization method for inhibiting the vibration of a cold continuous rolling unit, relates to the technical field of cold continuous rolling, and particularlyrelates to the emulsion flow optimization method suitable for the cold continuous rolling unit and taking vibration inhibition as a target. The method is characterized in that the vibration inhibition is taken as a target, on the basis that the over-lubricating oil film thickness critical value and the under-lubricating oil film thickness critical value are provided, and through an oil film thickness model and a friction coefficient model, the emulsion flow optimal set values, taking the vibration inhibition as the target, of racks are obtained. According to the method, the occurrence rate ofvibration defects of a rolling mill is greatly reduced, the production efficiency and the product quality are improved, and great economic benefits are brought to enterprises; and the vibration defects of the rolling mill are overcome, and the surface quality and the rolling process stability of finished strip steel of the cold continuous rolling unit are improved.