Most of the traditional grid emergency management capability assessment models use static evaluation. The conclusions drawn by this method are one-sided. In response to this deficiency, this paper proposes a dynamic evaluation method to make the evaluation results more reasonable and comprehensive. The basic index system of power grid emergency management capability assessment is established. The analytic hierarchy process and the coefficient of variation method are used to combine the objective and objective methods to assign weights to each index and perform static evaluation. The emergency management capability assessment is divided into four periods:prevention, preparation, response and recovery. The time-weighted average-time-series weighted geometric average hybrid operator model is used to analyze the grid emergency management capability to obtain the dynamic comprehensive evaluation value. The results show that the dynamic comprehensive evaluation method can be used to evaluate the emergency management capability of the power grid to obtain scientific and accurate results. This work is supported by National Key Research and Development Program of China (No. 2016YFC0205204).