The invention relates to the field of natural language processing, in particular to a term definition discriminating and analysis method based on the Internet. The problems that one term has multiple definitions, and the definition standardability and accuracy are poor are mainly solved. According to the technical scheme, the method is characterized by comprising the steps of obtaining term definitions to be discriminated and analyzed and a reference paraphrase, expressing the term definitions, calculating similarity, obtaining a term definition template, calculating term definition reliability and selecting a discriminating and analysis result. The constructed reference paraphrase considers the characteristics of term definition accuracy and professionality, a quintuple expression method of the term definitions is utilized for calculating the term definition similarity, the similarity among term definition feature words and semantic similarity among the definitions are considered, and the similarity among the term definitions is described better. The matching template of the term definitions is concluded to adjust the similarity among the term definitions, and the reliability of the term definitions is more accurate. According to the method, the good discriminating and analysis effect is achieved, and the problem that the term definitions are nonstandard and inaccurate can be solved.