Abstract: With p-nitrophenyl-azo fluoborate as chromogenic reagent, the optimum condition of determining carbaryl content in eggs by spectrophotometry was discussed and the analysis method was established. The linear range of carbaryl content was 0.1-1.0 μg/mL The recovery of standard addition of the analysis results of sample was between 82.6 % and 88.4 % and the RSD was 1.0 %.The method could be used in determination of carbaryl content in eggs.