Objective: Uracil was isolated from Aweto,Gecko,Eupolyphaga seu steleophaga,Centipede,Bufo bufo gargarizans Cantor,Periplaneta by reverse phase-high performance liquid chromatography.Methods: The chromatographic column was Shim-pack CLC-ODS C18,The mobile phase was 0.05 mol/L ammonium phosphate dibasic solution(pH=8.4).The flow rate was 0.6 ml/min,detection wavelength was 254 nm.Results:The linear range of Uracil was 2.49~49.80 μg/ml,the regression equation was A=145 874 c-45 893,r=0.999 9(n=7).The precisio...