Abstract: Chemical constituents and antioxidant activities of rosemary extract(RE)were determined. RE and its potassium-cyclodextrin metal organic frameworks inclusion complex(RE-K-CD-MOF)were applied in Chinese Bacon. The results showed that RE was composed of 12 components,mainly including rosemary acid. RE had obvious antioxidant activities. In the range of 0.5 to 1.5 mg/mL concentration,the DPPH free radical scavenging activity was higher than BHT but lower than V_C,and in the range of 1 to 5 μg/mL concentration,the OH free radical scavenging activity was higher than V_C but lower than BHT. The study of lipid oxidation behavior on Chinese bacon during the curing process indicated that both RE and RE-K-CD-MOF exhibited lower peroxide value and malondialdehyde content than that of the control. Moreover,RE-K-CD-MOF displayed better stability and effect in inhibiting lipid oxidation than that of RE. Compared with 0.3% of RE,when 0.3% of RE-K-CD-MOF was added,the peroxide value and malondialdehyde content of Chinese bacon were reduced by 17.8% and 17.2%,respectively,at the end of processing.