Abstract:As one of the representative of strong oxidizing agent，hydrogen peroxide is widely used in the food industry.However，there is a serious harm to the health of consumers in the food residue and illegally added hydrogen peroxide.In recent years，as a hot subject，cellular toxicology has been used to study the law and mechanism of the damage of exogenous substances on living cells which has a good application prospect in the field of food safety detection and research.In this paper，the changes of cell morphology and cell apoptosis were used to study the harm of food grade hydrogen peroxide.