The “Blockchain + RFID” two-in-one collaborative sharing model constructed by blockchain technology and radio frequency identification technology in the era of big data is described. This model uses the alliance chain to build the food traceability system and Go language is used to develop the chain in Fabric Code. Node.js is used to write the client program. The mobile terminal realizes the food traceability query by scanning the code, and the client uses certificate authentication account to query the web page. Through the interconnection of all aspects of food circulation, we can quickly locate responsible parties for food safety incidents.