The scope of adjustment of international investment law includes direct investment and private investment.

International investment law is the legal norm that regulates the cross-border investment activities of international private entities. Direct investment refers to investors setting up enterprises overseas or taking shares in overseas enterprises and directly engaging in economic activities. Private investment refers to investment activities conducted by investors through the purchase of stocks, bonds, funds, etc. The scope of adjustment of international investment law mainly includes investment access, investment protection and investment dispute settlement, etc. It aims to promote the liberalization, facilitation and security of cross-border investment, protect the legitimate rights and interests of investors, and promote the development of the global economy.