Snow was a long novel by Nikolayevich Tolstoy, published in 1886. The novel tells the story of a noble family, depicting family life, marriage concept, power struggle and other topics. Tolstoy's intention in writing this article was to reflect the complexity of the family and marriage system in human society, as well as the power struggle and tragedy that came with it. Through the description of the characters and plots in the novel, Tolstoy revealed the drawbacks of family ethics and moral concepts in feudal society and revealed the destructive effect of power struggle on family and marriage. The characters and plots in a novel are an important part of the author's intention in writing this article. Through the description of the characters in the novel and the design of the plot, the author tries to let the readers understand the characters 'personalities, psychology and behavior in order to better understand the theme and meaning of the novel. Therefore, Tolstoy's intention in writing this novel was to reflect the complexity of the family and marriage system in human society, as well as the power struggle and tragedy brought about by it.