The article analyzes the realistic conditions for the construction of financial science and technology ecosystem in Beijing under the background of the new round of service industry expansion，explains the connotation and operation mechanism of financial science and technology ecosystem，and constructs the basic model of the theoretical operation of financial science and technology ecosystem，and strives to explore Shun the relationship between the opening up of the service industry in Beijing，the opening of financial technology and the financial services industry，and the benign interaction between the development of financial technology and the opening of the financial services industry，and then the opening of the financial services industry as the main direction of the work，driving Beijing New One The round of service industry is open to the outside world，helping Beijing to develop “high-tech” industries and achieve high-quality development. Finally，based on the reality of the current restrictive problems of the smooth operation of Beijing’s financial science and technology ecosystem，the article proposes policy recommendations for optimizing the Beijing financial science and technology ecosystem.