Based on the reality of food traceability system construction and key security risk areas in pork supply chain，price and traceability information including farming，slaughtering and processing，distribution and marketing，and government certification are set，using a real choice experiment and a latent class model to study 209 consumers in Wuxi preferences and willingness to pay for traceability information and influence factors. Significant heterogeneity is observed in consumer preferences for traceable pork. Consumers are divided into ordinary type，risk-aware，price-sensitive and high-risk-aware four classes. The ordinary gets the highest proportion，followed by high risk-aware，while reveal the same preference order，Both of the ordinary and the risk-aware are willing to pay the highest premium for government certification information，followed by farming information. Farming risk-aware consumers are willing to pay the highest premium for farming information. Old consumers are more price-sensitive than the young consumers. Therefore，developing differentiated traceability system is advised，serving as a reference for the Chinese government in improving the decision-making market governance.