As a mobile energy storage resource, electric vehicles can participate in the emergency control service of power grids through the aggregation of operators. The power distribution strategy of electric vehicle operators participating in emergency control is proposed, and the means of electric vehicles participating in emergency control is analyzed. The flexibility and economy of different types of electric vehicle users participating in emergency control are discussed. The power distribution optimization model of electric vehicles participating in emergency control is established by comprehensively considering the three control modes of load transfer, charge reduction, and vehicle-to-grid (V2G), and the model is further simplified to a linear programming model by relaxation. The case study shows that the proposed power distribution strategy can quickly and effectively realize the power distribution of electric vehicles for emergency control and effectively activate the flexibility of electric vehicles within stations beyond traditional orderly charging control.