Based on evaluation experiment, this article selected the task sets from baidu wind vane. The experiment took average site indexing, the ＂first X precision＂ that was brought forward by H. Vernon Leighton and Jaideep Srivastava, measured the performance of five most famous Chinese search engines （baidu, iask, sogou, soso and zhongsou） from aspects of index database, retrieval functions, retrieval effects, results display and user efforts, in which the quantitative index was significantly analyzed. At last the author summarized what the searc...
