The term "Lotus Samadhi" first appeared in the Lotus Sutra, However, there is no explanation for the definition and practice of "Lotus Samadhi" in the Lotus Sutra. On the contrary, with the efforts of Huisi and Zhiyi, the theory of " Lotus Samadhi" practice has gradually become clear, and the practice steps have gradually become more concrete. From this we know that Huisi and Zhiyi’s Lotus Samadhi have indicative significance for Lotus Samadhi practitioners. Huisi believes that Lotus Samadhi is a non- sequence method practiced by those with powerful Mahayana roots. Take "practice with form" and "practice without form" as practice methods, and focus more on "practice without form".The practice of non-appearance is based on the profound Zen method, combined with emptiness, to show the thought of the Buddha Vehicle in（Eka-yāna一乘思想） the Lotus Sutra, and to regard all living beings as Buddhas and Bodhisattvas. Huisi's thoughts on the Lotus Samadhi cover: the view of the Lotus Sutra as "the Supreme Lotus Sutra"; and on the basis of the pure dharma body possession of the Tathagata in all living beings, the main purpose of the Lotus Sutra is summarized in the meaning of "wonderful", "wonderful" "It means taking "all living beings" as the main body and other thoughts. Zhiyi's Lotus Samadhi is to practice "non-sequence" practices and teach " sequence -by- sequence " confession rituals:to show the initial movement, those who practice for a long time can directly start with the "anlexing pen（〈安樂行品〉）". I n terms of the correct view of reality, in addition to the view of emptiness, it also integrates the three views of one mind（一心三觀） to develop the ten vehicle contemplation method.（十乘觀法） The similarities and differences between Huisi and Zhiyi's " Lotus Samadhi" in inheritance and interpretation can be learned from three directions: "The source of the scriptures of the Lotus Samadhi", "The thought theory of the Lotus Samadhi", and "the practice method of the Lotus Samadhi". There is no doubt that those who practice Huisi's Lotus Samadhi or Zhiyi's Lotus Samadhi can both prove the Lotus Samadhi. This thesis is divided into six chapters. In addition to the introduction of the first chapter and the conclusion of the sixth chapter, the main text is divided into four chapters: "Analysis of the Lotus Samadhi in the Lotus Sutra", " Analysis of Huisi's Lotus Samadhi ", " Analysis of Zhiyi's Lotus Samadhi", " Zhiyi's Inheritance and Innovation of Huisi's Lotus Samadhi ".The whole thesis takes " Lotus Samadhi" as the main axis.The focus of the discussion is on the exploration of the Lotus Samadhi of Huisi and the Lotus Samadhi of Zhiyi, supplemented by comparing the differences between the Lotus Samadhi of the Lotus Sutra, the Lotus Samadhi of Huisi and the Lotus Samadhi of Zhiyi, and then come to the conclusion that Zhiyi’s understanding of Huisi The similarities and differences between the inheritance of the Lotus Samadhi and the interpretation：similarities and Differences in Huisi’s and Zhiyi’s Lotus Samadhi Writings, similarities and differences between Huisi and Zhiyi’s thoughts and theories of Lotus Samadhi, similarities and differences in the practice metho
