In a novel, the main character will usually experience many difficulties and challenges, and in the process, the secondary characters will also undergo many changes. These changes are sometimes positive and sometimes negative, but they are all indispensable elements in the novel. This article will discuss how to use the changes of secondary characters to highlight the good intentions of the protagonist. The protagonist's good intentions could be reflected through the changes of secondary characters. For example, in the novel Alive, the protagonist Fugui experienced many difficulties and pains, but he still insisted on living. In this process, the change of Fu Gui's wife, Jiazhen, was an important factor. Jiazhen was originally a strong woman. After her husband met with misfortune, she still insisted on taking care of the family and supporting her husband's career. However, after her husband passed away, Jiazhen became weak and helpless. She lost her confidence and became irritable and sensitive. This change deeply reflected Fu Gui's good intentions for her and his care and love for her. Through the change of secondary characters, the protagonist's good intentions could be more deeply portrayed. For example, in a novel "Dream of the Red Chamber", Jia Baoyu was a secondary character, but his change was very important. In the novel, Jia Baoyu was originally a kind, intelligent and gentle man, but after experiencing many setbacks and hardships, he began to become cold, selfish and heartless. This change profoundly reflected Jia Baoyu's inner changes and his attitude and values towards life. This change also added a deeper meaning and meaning to the novel. In the novel, the changes of the secondary characters could be used to highlight the good intentions of the protagonist. This kind of contrast can help the reader understand the inner world of the protagonist and the difficulties and challenges he experienced. At the same time, this kind of contrast could also add more profound meaning and meaning to the novel.