As a new business model, e-commerce has great prospects for development. Meanwhile, such an e-business model has put forward higher requirements for the management level and the technology of transmitting information, and the construction of security system is particularly important. How to create a safe and convenient application environment for e-commerce, and providing adequate protection of information are the issues concerned by companies and users. Firstly, this thesis puts forward the existing safety risks of e-commerce in China. Then, their causes are analyzed. Finally, the relevant conclusions are drawn from the perspective of technology, legal, security management and network morality.