The dual circulation development pattern is a major strategic deployment based on the development situation at home and abroad，which is not only related to the adjustment of macroeconomic policies，but also has a profound impact on the investment behavior of micro enterprises. This report takes enterprises in Beijing in 2020 as the analysis object. On the basis of introducing the general situation of overseas investment of enterprises in Beijing under the dual circulation development pattern，we make a quantitative analysis of the specific situation of overseas investment from three dimensions of investment country，investment field and investment mode. The analysis shows that，in 2020，the total overseas investment of enterprises in Beijing shows a sharp decline；The investment country layout is relatively balanced，and mainly concentrated in developed regions and countries along the Belt and Road；The investment field is diversified，but the investment intensity is relatively concentrated. The investment mode is mainly independent investment，capital increase and M&A，supplemented by joint venture and equity investment. Combined with the case analysis of typical enterprises，this report believes that，under the dual circulation development pattern，the overseas investment development of needs to continuously improve multilateral cooperation mechanism，strengthen government policy guidance，innovate the way of overseas investment and actively cultivate the core competitiveness of enterprises，so as to improve the quality and level of international circulation and promote the high-quality development of overseas investment.