Design psychology is to study people's mentality in the process of design creation, and the psychological reaction of design to society and to social individuals, which in turn acts on design, play to make the design more able to reflect and meet the psychological role of people. This paper discusses the methods of product packaging design from the angle of design psychology, aiming at making the product packaging design more accord with the design psychology and the needs of users. Starting from the guidance of design psychology to design practice, the important value of psychology in product packaging design was discussed, and the strategy of product packaging design based on design psychology was discussed from three aspects.The design psychology can grasp the user's psychology well, and the product packaging design according to the design psychology can meet the user's needs and enhance the product's attraction to the consumer. Therefore, in the product packaging design, designers must grasp the psychological changes of consumers, fully consider the color psychology, graphic psychology and text psychology, use various ways and means, the color, graphics, text, modeling and other visual language, through the organic integration of the formation of packaging design, the psychological formation of consumers, and thus promote their identification and purchase of products.