A new method was established to determine 14 kinds of ultraviolet absorbers and antioxidants（including UV-0,UV-9,UV-71,UV-329,UV-326,UV-327,UV-234,UV-360,antioxidant 2246,425,TH-1790,3114,1010 and 1076） in plastic food packing materials by ultrasonic extraction combined with ultra high performance liquid chromatography（UPLC）.In the study,the plastic food packing materials were ultrasonically extracted with trichloromethane-methanol,and analyzed with C18 column，employing acetonitrile -0.1% formic water as mobile phases by gradient elution．All of the samples were detected with diode-array detector.The 14 analytes presented good linearities in the respective linear ranges,with correlation coefficients（r2） not less than 0.999 2.The quantitation limits（S/N=10） were in the range of 8.0 -33.0 mg/kg,the average recoveries（n=6） ranged from 83.6% to 116.2%,with relative standard deviations（RSD,n=6） of 1.3%-9.5%.The developed method,characteristic by simple pre-treatment procedure and satisfactory purification,was suitable for the simultaneous determination of 14 kinds of ultraviolet absorbers and antioxidants in plastic food packing materials.