Abstract: In order to achieve efficient management of the electricity market, effectively guide the trading behavior of market entities, regulate the management of market entities' default and disrupt market order, this article introduces the credit based on trading behavior, and adopts "two lines, one evaluation and one bottom line; two measures, one guarantee and one punishment" as the framework of Yunnan power market management mechanism.The credit evaluation mechanism (evaluation) selects market entities with excellent credit performance in trading behaviors, and the negative behavior observation mechanism (bottom line) draws the bottom line for the trading behavior of market entities. The above two lines collaborate to evaluate the trading behavior of market entities. The credit guarantee management mechanism (guarantee) enhances its risk prevention and control capabilities in the form of market entities paying deposits or performance guarantees, the early warning and punishment mechanism for dishonesty (punishment) urges market actors to consciously abide by market rules and regulations through punishment of dishonest entities. The above two measures coordinate to Control the trading behavior of market entities. All the above-mentioned mechanisms have been successfully applied in the Yunnan power market, effectively maintaining the order of the Yunnan power market and the rights and interests of all market entities.