Jin Yong can be regarded as a master of martial arts novels. He combines the legends of the world with history, and combines the chivalrous gentleness in the heroes of the novel with the peerless martial arts philosophy of life and nation. He opens up a new legendary story of martial arts novels, and enhances the uniqueness of martial arts novels, Jin Yong wrote 15 fictional works, and all becomes world famous cultural masterpiece. Among the fifteenth worls, "Demigods and Semi-Devils", can be said to be one of the best, and it has always been loved by readers. Jin Yong created one world after another in his martial arts novels, allowing readers to wander through them. When we are indignant over the grievances and hatreds of the characters in the book, the world that author created seems to be real. But back to reality, it is also clear that this is the author's fictional world. However, are these heart-wrenching plot of the characters in the novel just written to entertain the readers? Jin Yong used the Buddhist scriptures 《天龍八部》as the Chinese title of the book — "Demigods and Semi-Devils". This has made readers wonder what exactly the meaning of "Demigods and Semi-Devils" is. What is the connection between the title and the characters in the book? What are the Buddhist thoughts that the writer wants to express? This is the subject that the author wants to find out. This study uses the preface and the Buddhist classics quoted in the novel, the understanding of life in the story from the "Four Noble Truths", and the meaning of the storyline from the method of karma, to illustrate the influence of Buddhist thought on the plot of "Demigods and Semi-Devils". The research found from Jin Yong's novels, it is indeed possible to comprehend how to face the various tests in life and the philosophy of life.