With the deepening of information construction, our country's e-government construction has achieved great progress. In the process of its development, along with the rapid growth of the users and traffic, accumulated the massive amounts of data, and entered the era of big data. At present the construction of e-government database is based on relational database. The traditional relational database appears performance bottlenecks in dealing with big data of high concurrent reading and writing, and huge amounts of data in the efficient storage. How efficient storage, processing and access to these vast amounts of data is a problem faced in the field of e-government. At this point, a new data management technology-NoSQL appears to make up for the lack of a relational database. It can solve the diverse types of data management, processing and analysis of the problem. NoSQL has been widely used in Internet applications, but has not yet applied to the field of e-government. In this paper, on the one hand, in view of the electronic government affairs website concurrent access problems, put forward the strategy of the NoSQL for cache, to relieve the pressure of high concurrency, reading and writing to back-end relational database; On the other hand, aiming at the shortcomings of the existing data storage method, the author put forward the strategy of the NoSQL mixed with MySQL storage,to solve the relational database are not good at storing vast amounts of unstructured data. NoSQL not only has high reading/writing performance, but has strong expansibility, so it is necessary to introduce the NoSQL to the existing structure. By combining the advantages of relational database with NoSQL, the mixed storage architecture integration, which is the development trend of database technology in the future. This two strategies provide theoretical guidance for the electronic government affairs development.