The so-called "angel fund" is a kind of venture capital that specializes in investing in the seed stage and start-up stage of enterprises. Because its function is mainly to provide "seed capital" for budding small and medium-sized enterprises, it is the kindest venture capital to help them get rid of the danger of suffering and death, thus obtaining such a lofty name as "angel".

Angel fund is the most developed in America. Seeking truth from facts, it is not uncommon for angel funds to favor high-growth science and technology projects, with a yield of more than 50 times and a return of more than 10,000 times. It should be emphasized that some angel funds spend their own savings, not those of institutions and others. In this sense, they are wealthy philanthropists in the capital market.