Based on theory of planned behavior (TPB),this paper constructs the theoretical model of the formation of consumer’s intentions to buy genetically modified food .The model shows that consumer's decision-making with regard to purchase of genetically modified food is affected by seven factors: consumer's attitude towards genetically modified food,subjective norms,perceived behavioral control,perceived difficulty,moral norms,emotional involvement and self-identity.Based on scales by foreign scholars,this paper,after analyzing exploratory factors and pre-survey data,designs a questionnaire to empirically examine the theoretical models.