The invention discloses a traceability information coding method of agricultural product production process. The method realizes the data collection and storage of the key nodes in the process of agricultural products production through coding technology, labeling technology and hashing technology. By persisting the encoding in the form of two-dimensional code or electronic label, the convenient query and traceability of the event information of each important process in the agricultural product production is realized. As compared with the traditional commodity coding technology, the method not only queries for standardized product units, stock units and other information, but also enables fine-grained queries in units of process critical events, which not only improves the control and traceability of enterprises, consumers and administrative departments on the production process and quality and safety of agricultural products, but also effectively prevents malicious entities from tampering with the encoded information, and promotes the transparency of agricultural product quality and the enhancement of the awareness of quality and safety of all sectors of society.