The invention discloses an electricity consumption anomaly detection model with constraint conditions. The constraint conditions are given by a line loss anomaly constraint model, and the line loss anomaly constraint model comprises judgment on a non-special line day line loss anomaly and judgment on a special line day line loss anomaly. The electricity consumption anomaly detection model comprises an electricity anomaly model, a power factor anomaly model, an AC voltage anomaly model and an AC anomaly model. The electricity anomaly model comprises judgment on an electricity deviation degree,calculation of the electricity at a load control terminal and electricity metering by a watt-hour meter. The electricity consumption anomaly detection model with line loss anomalies as constraint conditions has the advantages of little misjudgment, high accuracy, less demand for samples and the like.