Product quality safety blockchain tracing system

The invention discloses a product quality safety blockchain tracing system, and the system carries out the one-object-one-code identification of a commodity, and writes the information of whole process circulation into a blockchain. The information on the blockchain cannot be tampered at will, and the information of each link is recorded on the blockchain from production to transportation to finalsales of commodities; in the prior art, counterfeited commodities are difficult to have commodity identifiers meeting specific rules; however, from production to sales of the commodities, a main bodyof each link writes an information signature into a blockchain with own identity, and information cannot be tampered. One product has one code, each important product has a respective exclusive tracing code, and a meat and vegetable circulation field quality safety tracing information management system is formed. Query is convenient, and a consumer can inquire in multiple modes of a network, a mobile phone and an inquiry