This paper explores the application of emotional design theory in the interface design of puzzle game apps,aiming to alleviate people's daily stress.It begins with an introduction to the concept and practical application of emotional design.Next,it examines the evolution of mobile game interfaces,the significance of emotional design,and the levels of emotional design theory.Finally,it summarizes the emotional design methods at the visceral,behavioral,and reflective levels in puzzle game app interfaces.The paper emphasizes optimizing the emotional aspects of game interfaces to attract users,reduce anxiety,and improve learning,work efficiency,and overall well-being.