In the theory of brand life cycle, there are three stages of brand: entry, growth, maturity and decline. In the initial stage of establishing a brand, the postgraduate entrance examination institution paid a huge cost of human and material resources. When the brand has a little popularity, there is little investment in continuing to expand the popularity, and there is a lack of continuous investment. At present, the brand of the postgraduate entrance examination institution is in the growing period. Maintaining the brand popularity, making it not decline, even more brilliant needs to carry on the brand operation. Brand marketing needs both internal and external innovation of the brand [1], combining the four elements of marketing products, prices, channels and services, and achieving brand maintenance through advertising monitoring, word-of-mouth marketing, user management and other ways. Promote the brand image, increase the brand awareness, and realize the continuous brilliance of the brand. This paper analyzes the problems and causes in the brand construction of postgraduate entrance examination, and puts forward corresponding solutions. This paper analyzes the problems and causes in the process of building the brand, and finds out the rules and ways to build and maintain the brand of education and training institutions.