With the rapid development of information technology, education informatization has become an important trend of national education reform. Under this background, student achievement management as a key link in education informatization, its importance is increasingly prominent. The development of blockchain technology provides a safer choice for achievement management. Then it introduces in detail the development of a Student Score Storage System Based on Blockchain Technology on the basis of building a blockchain simulation platform. The front end of the system mainly uses Flask library to build a web application framework. The front and back end data transmission mainly relies on the use of python requests library and defines fetch_posts class methods to realize API node calls. The back end mainly uses python scripts to realize block chain simulation. At the same time, log information and student score data are converted into json format data to realize data storage. At the same time, the system provides two roles: teacher end (authority node) and academic affairs end (multi-signature account), which is convenient for system management.