WWW为各行各业提供了大量的信息,但如何准确地从这些信息中提取出相关领域的权威信息是目前研究的热点问题之一。该文提出评判网站信息的多因素综合评估模型,该模型对网站的权威值进行合理计算,给出基于表格数据的语法树模型,完成了表格数据的自动提取。通过实例证明,该方法很好地解决了权威信息的准确和自动提取。 WWW provides a lot of information for all walks of life, but how to accurately extract the authoritative information from related fields is one of the hot issues in current research. This paper proposes a multi-factor comprehensive evaluation model for judging website information, which makes reasonable calculation of the authoritative value of the website, gives a syntax tree model based on tabular data and completes the automatic extraction of tabular data. The example proves that this method can well solve the accurate and automatic extraction of authoritative information.