A coordination strategy based on blockchain technology for the grid connection of electric vehicles and distributed energy is proposed. According to the total redundant power of regional power grid and total power demand of electric vehicles with time, electric vehicles are guided to different charging stations in different periods, which benefits the stability of the power grid. The electricity price of each charging station is adjusted competitively by means of independent application, smart contract approval and notification to the whole network. Smart contracts are jointly formulated by the regional power grid, charging stations and electric vehicle owners to effectively protect the interests of all parties. The application approval process based on smart contract eliminates the interference of human consciousness. The effect of the price guidance strategy proposed in this paper on the stability of the power grid and the improvement of the total income of all charging stations in the region is verified by case analysis. The proposed coordination strategy meets the development needs of electric vehicles and distributed energy grid connection in the future, and provides a reference for the application of blockchain technology in related fields.