Investment-loan linkage mainly refers to the strategic cooperation between commercial banks and PE (private equity fund) investment institutions. On the basis of PE investment institutions' evaluation and investment, commercial banks invest in enterprises in the mode of "equity+creditor's rights", forming a linkage financing mode of equity investment and bank credit. At present, it is mainly used in SME credit market. For example, after the establishment of the industrial fund, the bank will make equity investment in an enterprise and then follow up some loans; Or PE fund makes financial investment in an enterprise, which can optimize the financial structure of the enterprise and standardize the development of the enterprise, and the bank will follow up some loans in time. Some people have the following two understandings. One is that the main body of "investment" is VC (venture capital) and other investment institutions, and the main body of "loan" is banks. The deep cooperation between banks and VC forms a linkage. Another understanding is that while providing loans to enterprises, commercial banks can enjoy equity income and cover credit risks through legal forms.