The invention provides a simulation evaluation method and system for same-series dynamic reactive power compensation devices, and the method comprises the steps of carrying out the power module test of a to-be-evaluated dynamic reactive power compensation device, obtaining a test result, and building an initial model based on the dynamic reactive power compensation device; increasing reactive capacity of the initial model, and carrying out model verification to obtain a same-series device model; performing complete machine simulation on the same series of device models to obtain a simulation result; and according to the test result and the simulation result, evaluating the fault ride-through capability of the to-be-evaluated dynamic reactive power compensation device. Through a simulationevaluation means, the evaluation of the device is free from field testing and is not limited by a power grid and field working conditions, so that the manpower and material resources are saved; and through complete machine model verification, the factory test result of the dynamic reactive power compensation device power module is considered at the same time, the comprehensive evaluation of the fault ride-through capability of the dynamic reactive power compensation device is realized, and the evaluation result is high in reliability.