The invention relates to an electricity stealing detection method based on big data of an electricity utilization information acquisition system. The electricity stealing detection method belongs to the technical field of anti-electricity-stealing analysis. The electricity stealing detection method comprises the steps of: firstly, acquiring electricity utilization data of users in an investigatedregion, wherein the electricity utilization data comprises voltage data, current data and voltage-loss phase-failure data, and counting power generation user data in the investigated region; then detecting and processing the voltage data and/or the current data, and judging and identifying a suspected electricity stealing household; performing data pre-processing and big data processing on the voltage data and the voltage-loss phase-failure data through voltage data detection, and determining the suspected electricity stealing household; and comparing the user data and the current data throughcurrent data detection, cleaning a power generation user data row in the current data according to a user serial number, and judging the current data point by point. The electricity stealing detection method improves the precision, comprehensiveness, timeliness and reliability of electricity stealing detection, and reduces the detection cost.