ABSTRACT
To develop an automated coding software related to the underlying causes of death,based on the National Registration Information System on deaths,which could improve the quality of coding on the underlying causes of death in the conventional death surveillance system.Following the coding roles of the underlying death cause of ICD-IO and the design on principles of software of underlying death cause automated coding from some other countries,as well as in accordance with the coding strategy table from the USA,we implemented the automatization of the underlying death cause coding.Based on national registration information system on cause of death,an automated coding software of underlying death cause was developed with the coding correction rate closed to 85%.The automated coding software of underlying death cause could code the death cases of underlying death cause with high rate of correction,similar to that of the same kind softwares developed in other countries.