Trust deed, namely investment fund, is the basic legal document signed by IMF and fund management company (manager) on matters related to the management and operation of fund trust to fund management company. In the trust relationship, the money fund is the principal, the fund management company is the trustee, and the fund fund is the trust object. In the company fund, the client is the fund company; In a contractual fund, the principal is the fund holder, and once the investor buys the fund securities, it also recognizes the fund trust deed. A typical feature that distinguishes a fund from a joint-stock company is that its assets are entrusted to others (fund management companies) for management and operation through trust; The important foundation for the formation and development of contractual funds also lies in this trust relationship. Therefore, trust deed is a symbolic relationship of investment funds. [ 1]