The plastic packaging bag is a kind of packaging bag that uses plastic as a raw material and is used for producing various kinds of articles in daily life. It is widely used in daily life and industrial production, but convenience at this time brings long-lasting harm. The commonly used plastic bags are mostly made of polyethylene film. The film is non-toxic and can be used for holding foods. There is also a film made of polyvinyl chloride, polyvinyl chloride itself is also non-toxic, but additives added according to the use of the film are often harmful substances to the human body and have a certain degree of toxicity. Therefore, such films and plastic bags made of the films are not suitable for containing foods.