Investment is an important force driving the economic growth of the Yangtze River Delta region and the whole country. As one of the three carriages driving economic growth，investment has played a vital role in rapid economic growth，optimizing resource allocation and expanding employment. And as one of the strongest and most dynamic regions of China，investment plays a very key role in the economic development of the Yangtze River Delta. The fixed asset investment，foreign direct investment，outward foreign direct investment and venture capital in the Yangtze River Delta have shown an increasing trend year by year. In response to the challenges of the new situation at home and abroad，the Yangtze River Delta can further promote the expansion of regional investment scale and the optimization of investment structure by optimizing the investment environment，relying on major projects，focusing on high-end industries，and promoting regional integration，so as to promote the sustainable and healthy development of the regional economy.