In the fields of machine translation, automatic classificationand search engine technology, Yi word segmentation plays a very important role, which is also a vital part in Yi language information processing. This paper is based on the current segmentation of Yi word.Through the construction of Yi thesaurus and webpages of Yi, we can grab the page texts of Yi. Combining with the advantages of Yi language, with a detailed analysis such as the thesaurus, word segmentation algorithm, flowchart and structure, system interface and modulesand the experimental results, we build the segmentation platform of Yi page text. Finally, the results show that the segmentation platform has a property of higher accuracy, practicality and versatility.