The film The Da Vinci Code is based on the novel The Da Vinci Code by American best-selling author dan brown. Judging from the development of the film's plot, the film script is more faithful to the original, so we should first discuss the literary original of the film The Da Vinci Code. Dan brown's novel The Da Vinci Code is a cultural mystery novel. The author uses the common techniques in post-modern novels to dispel the basic concepts of binary opposition in the traditional value system, such as science and religion, human nature and divinity, good and evil. A major feature of dan brown's novels is the subversive exposition of traditional culture. As for how much of the description of religion and symbols in this novel is true, we can know that dan brown is a scholar-type novelist. When he was writing this novel, he did a lot of in-depth research and investigation on the background of the novel, that is, the history of Christianity, and mastered the relevant detailed materials. The events and mysteries about Christianity mentioned in his novels are not fabricated, but all come from the research topics of religious scholars' papers at present. Therefore, if we must explore whether the problems involved in the novel are true or not, I think there is no doubt that those problems exist in religion. The function of the novel is to comprehensively reflect the current research status of Christian history through novel description, in other words, to reflect some research viewpoints of Christian historians in a literary way. Generally speaking, the religious issues reflected in the novel The Da Vinci Code and the film The Da Vinci Code adapted from the novel are true.