The financial industry is the first application developed by most countries in the field of blockchain. Firstly, the decentralized and immutable characteristics of blockchain technology can ensure the security of digital capital to the greatest extent. Secondly, the synchronization of blockchain and universities can carry out capital settlement in a greater block. The digital tokens generated by blockchain can also be well applied to the payment field. A few months ago, ICO projects centered on the concept of block chain were in full swing. In this year alone, the block chain projects of private small and medium-sized enterprises reached more than 600, and more than 1,000 kinds of tokens. However, there are few real block chain projects, most of which are PURELY for the purpose of coin speculation. In early September, seven ministries banned ICOs and later suspended digital currency trading platforms, with state institutions and large enterprises becoming the main drivers of blockchain technology development. Blockchain technology was originally derived from geek and hack circles, and is an emerging Concept of Internet technology, so there is no fault for application and Internet industry. Many important data in the network can be stored and accessed in the way of blockchain, and the decentralization of blockchain can better prevent hackers from intruding. In addition, in the Internet game industry, blockchain technology can also play a unique role. Blockchain started as the underlying technology applied to Bitcoin. It has many advantages, such as decentralization and peer-to-peer transmission, and is backed by hard-to-crack encryption algorithms. This makes blockchain a safe and convenient information transaction tool. With the deepening of research on blockchain, people find that blockchain technology can not only be applied to the currency and financial field, but also has natural advantages in information transmission, commodity traceability and smart contract. Blockchain can be thought of as a decentralized distributed ledger where anyone can participate in maintaining the system and making the rules. In short, the application industry of blockchain generally has the following characteristics: data security needs to be guaranteed, a large amount of information interaction needs to be handled, and the industry has a high degree of informatization. In fact, with the improvement of the Internet and block chain technology, according to the current situation in China, China’s block chain will gradually become standardized, at the same time, the crowdfunding block chain project from small and medium-sized enterprises will? Gradually less, more with countries or big business projects why new blockchain. In terms of industry, the first application is of course banking and finance, followed by currency and payment, and finally other industries. We have to wait and see the future of blockchain.