Carbonate reservoirs widely distributed around the world，with a relatively high proportion of the total oil production. Due to the complex structure，the development of fractures，strong heterogeneity and preferential oil-wet characteristic，the oil recovery of carbonate reservoirs was always low with water injection. Chemical assistance was an effective method to further improve the oil recovery of such reservoirs. In order to further study the chemical EOR technology of fractured carbonate reservoirs，the mechanism，common used surfactants，and numerical simulation methods of chemical EOR for improving the recovery of fractured carbonate reservoirs were systematically summarized. Several examples of field projects that successfully applied surfactant-assisted method for oil recovery were introduced. Finally，the focus of future work and research direction were proposed.