Under the background of cultural tourism economy, this paper explores the design methods of tourism cultural and creative products. Guided by the theory of semiotics three-in-one model, using FAHP and CRITIC model, combined with game theory, this paper screens and weighs cultural symbols, and discusses their application in tourism cultural and creative product design. Taking Caishiji as an example, this paper analyzes cultural symbols from four dimensions: shape, pattern, color and material, and applies them to the design practice of tourism cultural and creative products. The evaluation results show that this design method based on cultural symbols can effectively improve the design efficiency and scientificity, and the obtained tea set design scheme can also meet the needs of users. This study is of great significance for designers to understand and use regional symbols and improve the design effect of tourism cultural and creative products.