As the key node connecting power generation side and user side, electricity selling enterprises are related to the stable operation of the power market. In the context of new electricity reform, many provinces in China have built credit management systems and achieved certain results. With continuous deepening of the reform of the power market, the current management system that relies on the combination of the simple credit evaluation and guarantee credit line can no longer fully adapt to the current market environment. Consequently, taking typical power market in China and the United States as examples, a multi-level analysis of electricity selling enterprises from the aspects of evaluation mode, third-party evaluation, guaranteed and unsecured credit line is proposed. Combined with the development needs of China’s electricity market, suggestions are put forward on the construction of credit management system for electricity selling enterprises from various aspects of construction of credit evaluation indicators, third- party evaluation, credit line and so on.