Abstract: Voltage sag can cause abnormal interruption of production process of industrial users, resulting in huge economic losses. In view of the single governance angle and poor governance effect of existing voltage sag mitigation schemes, according to the electrical characteristics and physical attributes of industrial processes, this paper proposed electrical means focusing on voltage control and physical means focusing on process quantity maintenance. From the point of view of process parameters, the effects of various mitigation measures were measured in a unified way. A voltage sag mitigation method was proposed, which combines the installation of customized power equipment with the renovation of plant facilities, in order to maintain the process parameters during the period of disturbance and avoid the serious consequences of process interruption. Considering the investment cost and income of various mitigation measures, the allocation of mitigation measures was determined with the goal of maximizing the net present value (NPV) of the scheme. The mitigation strategy proposed in this paper was applied to a new energy material enterprise. The results show that the proposed method can effectively mitigate the consequences of voltage sag and is more economical than the traditional voltage compensation scheme.