The invention provides a data processing and querying method for blockchain digital currency. The data processing and querying method comprises the following steps: S1, requesting an Ethereum webpagethrough a high-concurrency program, and obtaining the block data, external transaction data and internal transaction data generated in the historical transaction of an Ethereum; S2, calculating the account balance of each account in the Ethereum after each transaction according to the block data, the external transaction data and the internal transaction data; and S3, constructing a big data cluster, and realizing storage and real-time query of the block data, the external transaction data, the internal transaction data and the account balance. According to the data processing and querying method, the full data of the Ethereum is rapidly obtained through the high-concurrency program, and the account balance is calculated, and the full data of the Ethereum is obtained, and the calculation method is simple and effective, and the data is stored through the big data cluster, and data real-time query is carried out, and digital currency management and query can be efficiently and accuratelyachieved.