目的 为了解决食品接触用塑料包装在整个流通过程中信息不全面、不及时、易篡改、追溯数据真实性和完整性无法保证等问题，提出一种基于区块链的二维码技术，应用于食品接触用塑料包装溯源管理系统。方法 从目前区块链的应用分析，对区块链技术在食品接触用塑料包装溯源管理相结合的可行性和必要性进行分析。结果 解决了传统食品接触用塑料包装数据容易被篡改、盗用和真实性不足等问题，实现了食品接触材料全过程数据溯源，保证了食品质量安全。结论 可将区块链技术应用于追溯系统的数据存储、信息传递及验证模式。

This paper aims to present a blockchain-based traceability management system for plastic packaging for food contact to solve the problems of incomplete, untimely, easy-to-tamper, and unguaranteed authenticity and integrity of tracing data in the whole circulation process of plastic packaging for food contact. This paper analyzed the feasibility and necessity of combining the blockchain technology with traceability management of plastic packaging for food contact from the application of blockchain at present and from the aspects of technical principle. It made up for the problems of traditional plastic packaging data easy to be tampered, embezzled and lack of authenticity, released whole-process traceability of materials for food contact and guaranteed food safety. The blockchain technology can be applied to the data storage, information transfer, and verification modes of traceability systems.