The drying filmforming process and mechanism about PVA water-soluble glues are analyzed systemically, then, it discusses the functions of infrared ray on solidify filmforming of the PVA water-soluble glues, and brings forward a new method of infrared ray-hot air drying in its salivating machinery. In practical production, infrared ray-hot air drying method is proved to be a better way in increasing the speed of film forming PVA water-soluble glues.