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With the continuous development of blockchain technology in the field of traceability of agricultural products, the quality and safety of agricultural products have been effectively guaranteed. Due to the complex production process of Chinese seed potatoes, obvious physical form differentiation, long production cycle of each link, and many varieties, it is difficult to share the traceability data of all production links, which is prone to the problem of seed potato varieties, grades and other goods transmission. Seed potato production traceability cannot be effectively guaranteed, and the production base and relevant supervision departments cannot obtain all effective traceability data. When the problem of transshipment occurs and the final consumer traces the source of seed potato production, the positioning of the responsibility link is not clear, and it is difficult to find the exact responsible production link and the responsible person and other problems. Based on the above problems, a channe-proof traceability model of seed potato was proposed based on smart contract and digital signature. By using the characteristics of block chain technology, such as tamper-proof, data transparency and data sharing, intelligent contract was used to store the traceability data of the whole link of seed potato production and realize the highly sharing of the traceability data of the whole link of seed potato production. In addition, the smart contract and digital signatures were combined to solve the problem of cross-production easily occurring in the production process by using the public-private key pair verification and the highly autonomous blockchain network ecological environment of smart contract. Based on Hyperledger Fabric, an anti-channeling traceability model for seed potato production base was designed. The related test results showed that the model could realize the functions of seed potato production traceability, anti-channeling, channeling alarm information chain and query. The average link time of seed potato production traceability data was 2566ms, the average query time was 95ms, the average alarm trigger and alarm information link time was 2562ms, and the average query time of specific alarm information was 77ms. The model had high comprehensive performance, which can realize the safe storage of seed potato production traceability data, effectively solve the problem of seed potato production channeling, meet the link and query requirements of seed potato production traceability data, improve the seed potato production quality traceability guarantee, and provide reference for preventing seed potato production channeling to improve the overall efficiency and safety traceability.