There are three main stock issuance systems, namely, examination and approval system, approval system and registration system, and each issuance supervision system corresponds to a certain market development trend. In the process of gradual maturity of the market, the stock issuance system should also be gradually changed to meet the needs of market development. Among them, the approval system is a fully planned issuance model, and the approval system is the intermediate form of the transition from the approval system to the registration system. At present, the mature stock market generally adopts the registration system.