The invention discloses an optical thin film pressing and neatening machine. The optical thin film pressing and neatening machine comprises a pressing and neatening device and a bottom disc. Two pulleys are arranged on the lower end face of the bottom disc. An inlet is formed in one end of the pressing and neatening device, and an outlet is formed in the other end of the pressing and neatening device. The pressing and neatening device is internally provided with fixed rollers and lifting rollers. The fixed rollers and the lifting rollers are opposite in rotation direction. The fixed rollers cooperate with the lifting rollers to roll out optical thin films entering therein through the inlet in the direction of the outlet. At present, the optical thin films having the defects of corner rolling and folds are usually abandoned or treated one by one, and a device for collecting all the optical thin films having the defects of corner rolling and the folds into rolls and conducting secondarypressing and neatening treatment is not provided; according to the optical thin film pressing and neatening machine, the two types of rollers are adopted for tightening the optical thin films; the optical thin films can be collected massively and rapidly; and the optical thin films in the scrolled form are rolled out to be flat rapidly and neatened.