The invention provides a film laminating unit with a corona treatment function. According to the film laminating unit with the corona treatment function, a corona machine is arranged between a film laminating main unit of an existing film laminating unit and a paper cutting machine. According to the technical scheme, after corona treatment is conducted on a plastic film on a site for the film laminating procedure, the film laminating procedure is conducted immediately, so that recession of the corona effect of the plastic film after the corona treatment is avoided; in addition, the optimal corona treatment effect is achieved by adjusting corona treatment control factors according to plastic films of different properties and various factors such as the work environment conditions of the site, film laminating requirements and paper quality.