The invention discloses a power grid emergency load shedding method based on a degree of participation of a demand response. The method includes the following steps: obtaining historical power utilization data information and economic benefits of a power grid load shedding user; calculating average economic loss and a participation active degree of the demand response of the power grid load shedding user; calculating to obtain user group information of a user having a load to be shed by using minimum average economic loss as an optimization criterion; and according to the user group information of the user having the load to be shed, performing load shedding operation to complete power grid emergency load shedding. The method considers power utilization behavior habits of the user having the load to be shed under a background of the demand response, calculates the average economic loss and the participation active degree of the demand response and obtains a response non-active set of the power grid load shedding user by collecting historical daily power utilization load data information and economic benefits of the power grid load shedding user, obtains information of a user groupto be shed according to the optimization criterion of minimum average economic loss, and achieves scheduling operation of a to-be-shed load, and therefore, the method is user-friendly, is stable and reliable, and meets technical requirements of a power grid.