We conducted questionnaire survey by investigating 36 primary health care facilities in Jiangsu Province using a multi?stage random sampling method. We described and compared the situation of the national essential public health service among the north, middle and south part of Jiangsu and used the Gini coefficient to evaluate the equity of service. Institutions that we investigated basically have reached the assessment of national standards, but there were significant differences between areas and projects. The Gini coefficients of health records and health education were 0.387 and 0.260, respectively, indicating a relatively reasonable and fairly fair state. The Gini coefficients of other projects were all less than 0.2, showing perfect equality. The implementation of the national essential public health service project in Jiangsu has progressed smoothly, and equalization has been basically achieved. However, there are still differences among different regions.