[Objectives] Dysphoria citri Kuwayama (Homoptera:Psyllidae), the vector of Huanglongbing (Candidatus Liberobacter asiaticus), has caused major damage to Chinas citrus industry. The objective of this paper is to (a) obtain optimal parameters for a CLIMEX model for D. citri, and (b) to investigate the past, current and future potential distributions of D. citri in China. [Methods] Information on the range of D. citri before and after 1990 in China were derived from the literature published since 1970. The parameters of a CLIMEX model were adjusted to fit these data and the species potential future range was estimated by the model. Two meteorological datasets, the CLIMEX integrated climate dataset (1961-1990) and a 1991-2010 dataset released by China Meteorological Administration, were used for model fitting. The future potential distributions of this pest in China were then predicted using CliMond datasets, including bioclimate data in 2030 and 2050. [Results] Compared with the distribution in 1990, by 2010 the northern boundary of D. citri range had, excluding the Sichuan Basin, moved north of latitude 32oN. The post-1990 range was a good to fit to that predicted by CLIMEX. By 2030, D. citri is likely to colonize Central China as a result of global warming. Its 2050 distribution should, however, remain relatively unchanged, due projected rising temperatures and decreasing precipitation. [Conclusion] The northern edge of D. citris range will advance significantly northward in the future, but due projected reduced rainfall should not extend beyond 32.5°N. Its worth noting, however, that marginal habitat, where populations of this pest could become established, will continuously move northward. Early warning and stricter regional quarantine measures should be taken in these areas to cope with the predicted expansion of the range of this pest.