Objective To investigate the status of consumers' knowledge,attitude and practice(KAP) towards nutrition labeling and the influential factors.To provide the basis for the nutrition labels' promotion.Methods A questionnaire survey was conducted among 1 141 consumers in Luwan District,Shanghai.Results Only 5.8% of the consumers understood the nutrition labeling completely.82.0% of the consumers regarded it necessary on the usage of the nutrition labeling.In the purchase of food,30.3% of consumer's purchase decisions were affected by nutrition labels.The result of multivariate Logistic regression showed that the following factors were significantly associated with the effect: age(OR=0.962,95% CI:0.933~0.992),education(OR=0.270,95% CI:0.084~0.866),understanding of basic nutrition knowledge(OR=0.949,95% CI:0.915~0.985) and the attitude toward the essentiality on nutrition labeling(OR=0.912,95% CI:0.895~0.941).Conclusions The level of knowledge and practice about nutrition labeling was high among consumers,but only a few of them understood the nutrition labeling completely.It is necessary to implement nutrition and health education aimed at promoting consumers' knowledge and scientific practice about nutrition labeling.