Abstract: With the transformation of power system to a clean and low-carbon type and the continuously rapid growth of power consumption, it is getting more difficult to ensure stable supply of electricity. Therefore, it is necessary to further study the regularity of power consumption so as to provide reference for the power supply,power grid development and power demands forecast. Since the implement of the12th Five-Year Plan, electricity consumption in Ningxia has fluctuated greatly. The increment of electricity consumption in Ningxia from2011 to 2021 is analyzed by the factor decomposition model. The results indicate that the expansion of economic scale is the primary driving force for the growth of power consumption, and that the change of industrial structure has little impact on power consumption. Whereas intensity of power consumption restrains the use of electric power and becomes the primary reason for fluctuation of the growth rate.