Based on the sample of 9741 listed international companies and their counterparts in Shanghai and Shenzhen A-share stock markets during 2008-2016, this paper empirically tests the relationship among the administrative hierarchy, geographical distance and international diversification. The study finds that first, there is a significant positive relation between administrative hierarchy and international diversification of enterprises, that is, the higher the administrative hierarchy of the enterprise registration, the more likely the enterprise is to carry out the international diversification. Second, there is also significant positive relation between geographical distance and international diversification of enterprises, that is, the closer the registered place of the enterprise is to the hub city of the province, the more likely it is for the enterprises in the area to operate internationally. Thirdly, the positive correlation between the administrative hierarchy and the international diversification depends on the geographical distance, which means that compared with the influence of geographical distance, the administrative hierarchy has a greater positive effect on the international diversification.