The difference between Lao She's writing of Cat and Hen can be considered from the following aspects: 1. The difference in the plot: Cats is a novel with a cat as the theme, which tells the life experience of a cat and its relationship with humans, while Hen is a novel with a hen as the theme, which tells the life experience of a hen and its relationship with humans. In terms of storyline, Cats paid more attention to the loneliness, desire and dependence of cats on humans, while Hen paid more attention to the freedom, independence and reaction of hens to humans. 2. Different characters: The protagonist in Cats is a cat, its image is rigid, its character is distinct, and it has a strong dependence on human beings; while the protagonist in Hen is a hen, its image is relatively complicated, it has a free and independent character and has complex feelings for human beings. In terms of character image," Cats " was more focused on the characteristics of cats, while " Hen " was more focused on the characteristics of hens. 3. Different writing styles: "Cat" is one of Lao She's representative works, its writing style is humorous, full of irony and sense of humor;"Hen" pays more attention to emotional description, its writing style is more delicate, full of reverence and love for life. In terms of writing style, Cats was more humorous and satirical, while Hen was more emotional and described.