Dickens 'works are usually regarded as one of the representative works of realistic literature, and the happy ending is one of the common endings in realistic literature. Dickens 'works usually described the lives of people at the bottom of society. They often faced various difficulties and challenges, including poverty, disease, family misfortune, and so on. Therefore, Dickens 'works often emphasized the perseverance of human nature and the power of hope, and the happy ending expressed this power of hope. Happy endings can make readers feel satisfied and happy. This kind of ending shows that no matter how difficult life is, people can finally overcome difficulties and move towards happiness. This kind of ending could inspire the readers to face life positively with hope and confidence. Dickens 'works usually have profound social and educational significance, and happy endings can better express this social and educational significance, allowing readers to better understand the theme and values in the works. To sum up, the reason why Dickens 'works usually adopted happy endings was to better express the perseverance and power of hope of human nature, as well as the confidence and courage to face life positively.