Home and Cold Night was one of Ba Jin's representative works. From Home to Cold Night, Ba Jin's writing style had changed significantly. In Home, Ba Jin narrated the rise and fall of a family as a young man. In the novel, home is a theme full of contradictions and conflicts, revealing the complexity and hypocrisy of human nature. At the same time,"Home" was also one of the most representative novels in Ba Jin's writing career. It deeply reflected the social class differences and class contradictions at that time and became a classic work of modern Chinese literature. The change from Home to Cold Night was reflected in Ba Jin's writing style. In Cold Night, Ba Jin used a calmer and more objective method to reveal the dark side of human nature and guilt through the description of social environment and character psychology. At the same time, the cold night was also a more symbolic work. The moon, cold night, lights and other elements in the novel had become important symbols in Ba Jin's creative career. In addition, Ba Jin adopted a more modern writing style in Cold Night, creating a mysterious and depressing atmosphere through the abstract treatment of time and space. This style was also reflected in Ba Jin's other works, such as Border Town and Spring Silkworm. Together, they constituted the variety of Ba Jin's creative style. To sum up, the change from Home to Cold Night was an important change in Ba Jin's writing style. In Cold Night, Ba Jin adopted a calmer, more objective and modernist writing style, paying more attention to the revelation of human nature and social reality. This change not only reflected the progress of Ba Jin's creative thinking, but also reflected his contribution to the development of modern Chinese literature.