Abstract: In order to overcome the disadvantages of traditional traceability system, such as high security risk, easy data tampering and inconsistent data of multiple systems, etc., this paper proposes a design scheme of food safety traceability platform based on blockchain. The quality information traceability chain was built based on the principle of "one number, one source, accurate and unique". The full data was placed in the local data storage area, and the fingerprint characteristic information of the total data was calculated. The fingerprint characteristic information data was put on the chain with the help of the unified traceability coding mechanism. A blockchain-based food safety traceability platform was designed and developed to realize product quality information publicity and product traceability. The platform could not only help the whole industry to establish mutual trust mechanism, promote the healthy and orderly development of the industry, but also enable the regulatory authorities to achieve transparent and efficient management.