Abstract:Inter-regional patent citations play an important role in promoting the cross-regional mobility and sharing of technical knowledge. We take the nanometer field as an example, collects the data of patent citations from 2011~2015, analyzes the characteristics of patent citation relations among 31 provinces and cities. It constructs the influencing factors of inter-regional patent citation relations and uses Poisson distribution and Negative binomial model for regression. It is concluded that high cited, high citation and double high areas are concentrated in Jiangsu, Shanghai, Beijing and Guangdong, the density of citation is increasing rapidly. The amount of citations and self-citations continue to increase, but the number of citations is reduced, indicating that the regional radiation effect of nanotechnology is weak, the sharing degree is high in the region, and the inter-regional patent citation relationship is not active. Through the regression analysis, it is found that there is significant positive correlation between R D expenditure, technology coverage, h-index and interregional nanotechnology patent citations. Based on the above conclusions, we give the suggestions to enhance the patenting technology of regional patent in China.