Based on interpretation of the new electricity reform policy, learning from the electric side reform experience at home and abroad, the research on service strategies for electricity sales subject to participate in market competition is carried out based on market maturity classification and power customer value rating. Firstly, the classification and characteristics of the power sales companies are clarified, and the ways in which different types of power sales companies participated in the market competition are studied. Secondly, the theoretical system of the maturity of the electricity sales market and the hierarchical model of the power user value are constructed. Finally, a differentiated service strategy with customer demand oriented and external competition environment combined in which the company is located is proposed, providing strategic reserves and theories support for the operation of power sales companies.