An embodiment of the invention provides an electricity stealing identification method and an apparatus thereof. The method comprises the following steps of acquiring electricity utilization data of a user to be identified; calculating a preset abnormal electricity utilization index according to the electricity utilization data of the user to be identified; and if the user to be identified is an abnormal user, according to the abnormal electricity utilization index of the user to be identified, generating an electricity utilization characteristic vector of the user to be identified; calculating a similarity value of the electricity utilization characteristic vector of the user to be identified and an electricity stealing fingerprint vector of each preset electricity stealing method; if any similarity value acquired through calculation exceeds a preset threshold, indicating that the user to be identified is a suspected electricity stealing user. In the embodiment, through calculating the similarity value of the electricity utilization characteristic vector of the user to be identified and the electricity stealing fingerprint vector, whether the user to be identified belongs to the suspected electricity stealing user is automatically identified, subjective assumption made by an expert on electricity stealing identification is avoided and accuracy of electricity stealing identification is increased.