Crawler technology is a kind of technology that can automatically collect data from a large amount of web pages and data resources (such as videos, pictures, texts, etc.) on the Internet without manual intervention, and according to the automatic program or script technology, the relevant information scattered in different websites is summarized together for real-time monitoring. It can get information such as policy changes, demand changes, price fluctuations and other content changes in a short time. At present, in response to the changes in the domestic and foreign economic situation, China is promoting the construction of free trade pilot zones, the construction of the Belt and Road as the fulcrum, reshaping the pattern of opening up. This paper takes Jiangsu Province as a case to discuss the dynamic correlation between external opening up and regional economic growth, which can effectively help the government to have a real-time, accurate and comprehensive understanding of the dynamic correlation between external opening up and regional economic growth, hoping to provide a strong basis for the government to make relevant enterprise strategies and government decisions, and promote the prosperity and development of regional economy.