This paper first discusses the present situation and challenges of economic integration in Southeast Asia. At present, Southeast Asian countries have strengthened the process of economic integration by establishing free trade areas, promoting investment liberalization and promoting regional financial cooperation. In addition, Southeast Asian countries have also actively participated in regional cooperation mechanisms, further promoting economic integration. Secondly, this paper looks forward to the future development trend of economic integration in Southeast Asia. It is predicted that in the future, Southeast Asian countries will further strengthen cooperation and promote the in-depth development of economic integration. Under the background of globalization and regional economic cooperation, Southeast Asian countries will face more opportunities and challenges. Therefore, Southeast Asian countries need to strengthen policy coordination, increase investment, and promote innovation and technological progress to meet the challenges of future development.