With the continuous development of the Internet and big data, e-commerce has become a new business model. The rapid development of online shopping methods enables consumers to quickly and easily complete their purchases without face-to-face contact with merchants. But consumers may have the demand for returns after purchase, from the theory of regret in e-commerce definition discussion, in China the establishment of regret right is necessary. However, the right to regret in the establishment process has also encountered a series of problems. Based on the basic law analysis of consumers' right to regret, this paper analyzes the shortcomings of the current legislation and puts forward suggestions for perfection, on the basis of basic law analysis of consumers' right to regret, and analyzes the shortcomings of the current legislation and puts forward suggestions for perfection, so as to achieve the ideal of substantive fairness of economic law.