Abstract:For a long time, the organic food quality and safety assurance mechanism based on "traceability + certification" in China is difficult to play an effective role. Due to the serious information asymmetry in the organic industry for a long time, the domestic organic market is developing towards the "lemon market", especially the domestic high-quality organic agricultural products are facing the double squeeze dilemma of local counterfeiting and import. The emergence of blockchain provides technical support for the transformation from the traditional "traceability + authentication" mechanism to a more efficient "traceability trust" system, and for getting rid of the development dilemma of organic agriculture. The "traceability trust" system helps to break the information asymmetry, rebuild the trust relationship between producers and consumers, and effectively solve the problem of food quality and safety. In the process of effectively embedding blockchain, there are still three difficulties: technology, consumer cognition and interest coordination. The promotion and coordination of information protection and opening, the reduction of embedding costs, the forced on the chain and the multi-dimensional development of blockchain application scenarios will help the blockchain to play a role in the "traceability trust" system as soon as possible.