I. Introduction
With the rapid development of the Internet, great changes have taken place in financial domain. The development of Internet finance has brought subversion to the traditional finance, and also changed people's work and life style. Compared with traditional finance, Internet finance has the characteristics of low cost, high efficiency, wide coverage and high risk. The emerging social media, represented by Micro-blog, provides relevant financial information. Sentiment analysis and key entities of online financial texts help to understand the public's sentiment state, timely access to public opinions and attitudes, and rapidly get to the subject of information. Thus it is of great practical significance for risk control, public opinion analysis and government regulation [1]