Abstract: With the rapid development of the Internet and the application of big data technology, online comments data have become an important means to get visitors' evaluation after visiting scenic spots. From the perspective of users, the paper builds an evaluation system in after-use of Garden Exhibition based on online comments data, and evaluates various factors and makes analysis about after-use of China Garden Festivals based on online comments data, then sums up the current prominent after-use problems, puts forward related suggestions to solve these problems, in order to provide new ideas for the sustainable after-use development of China Garden Exhibition.