The invention relates to a method for automatically recording and positioning semantic expression information of a traffic accident site. The method includes the following steps that firstly, when an accident data comprehensive management system receives input accident data, an accident site inputting and automatic positioning ActiveX is called; secondly, the accident site inputting and automatic positioning ActiveX requests road name data and a topological structure of a road net from a road name dictionary server; thirdly, the accident site inputting and automatic positioning ActiveX receives accident site information input by a user and automatic positioning is achieved according to the information input by the user; fourthly, whether positioning is right or not is judged, if yes, reporting is performed; if not, the user drags an accident site icon by hand to achieve manual positioning and then reporting is performed; fifthly, the accident site inputting and automatic positioning ActiveX transmits the accident site and the positioning information back to the accident data comprehensive management system, wherein the accident site and the positioning information are input by the user. Compared with the prior art, the method for automatically recording and positioning the semantic expression information of the traffic accident site has the advantages of improving the efficiency of data input, the correctness and the effectiveness of the accident site and the like. A basis is provided for correlation analysis of the accident site.