Great achievements have been made in crop germplasm resources conservation and utilization in China， but there are also problems such as unclear background， low efficiency of sharing， unclear ownership of germplasm resources， etc.， which can be effectively solved by carrying out crop germplasm resources registration. From the perspective of crop germplasm registration information flow， this paper analyzed the overall workflow of crop germplasm resources registration and designed the crop germplasm resource registration blockchain model. Firstly， according to the business characteristics of crop germplasm resources registration， determined the users and main process of registration， which includes three stages： data filling， review and sharing. Then the blockchain network model， workflow model and data model was designed. Finally， improved the DPOS consensus mechanism， according to the business demands of crop germplasm resources， and the construction method of incentive mechanism was given. The blockchain model of crop germplasm resource registration realizes the distributed storage of registration data through decentralization， increases the reliability of data through DPOS consensus mechanism， ensures that the data in the chain is difficult to tamper with and easy to trace through the special data structure of blockchain， which improves the data security. This paper provides a new idea for the development of crop germplasm resources registration system in the future.