Based on the theory and practice of semantic knowledge representation in semantic network, this paper puts for- ward the idea of the representation of semantic network of Yi language. Firstly, the semantic units and methods of seman- tic network representation in Yi language are described. Secondly, it analyzes the classification of semantic network repre- sentation in Yi language, and clarifies static aggregation network, dynamic combination network and the activation process of knowledge network. Finally, the possible applications of Yi language semantic network in machine translation and knowledge reasoning are discussed. The exploration of semantic network representation of Yi language lays a foundation for the construction of semantic knowledge base with rich Yi language information resources, so as to promote the innovative development of intelligent application of Yi language information processing and natural language processing.