In the Chinese teaching and research,it often needs to draw syntax tree for analyzing of relationship among compositions of sentence.Drawn syntax tree manually has many defects,such as having huge workload,needing immense storage capacity and so on.This paper proposes a method to generate syntax tree automatically and display the syntax tree in web page by using VML technology.By comparing the syntax trees generated in this paper with the syntax trees from Treebank of PKU,the result shows that the method of coordinate computing proposed in this paper is more precision,which also demonstrates the efficiency of the visualization method.