Abstract: On March 1, 2022, the newly revised "Seed Law of the People’s Republic of China" came into effect. Article 28 and Article 90 of the new "Seed Law" stipulated the EDV system for the first time, and clarified the definition of substantially derived varieties. The establishment of this system would stimulate the original breeding innovation, solve the serious problem of seed homogeneity from the root, which was of milestone significance for promoting the revitalization of the seed industry. The establishment of the EDV system fully demonstrates the practice of the fairness and justice value of the law in the field of seed industry, of which the establishment activated the legal protection system of the seed industry and brought the development of the seed industry into a new journey of legalization. Since its promulgation, the Seed Law has undergone four revisions, from the establishment of a special chapter for the protection of new plant varieties to the proposed establishment of an EDV system. It has continuously improved for more than 20 years to guide, lead and promote the healthy development of our country’s seed industry.