In the financial commodity transaction, due to the asymmetric information, there is striking difference between financial service providers and financial consumers on how much they master the information. Financial consumers are obviously at an unfavourable position. In order to solve the asymmetric information between financial service providers and financial consumers and achieve the substantial equality between them, financial service providers need to fulfill the contracting explanation obligation. The contracting explanation obligation of regulation by private law is good for protecting the financial consumers and the healthy development of the financial market. At present, there are some defects in China contracting explanation obligation on the elements of reticent fraud, the legal provisions, the regulatory system and the Internet model. Based on the these defects, the paper gives some feasibility proposals.