The invention discloses an anti-electricity-stealing evidence obtaining key data processing method, device and apparatus, and the method comprises the steps of obtaining the anti-electricity-stealing evidence obtaining key data which comprises the first data and the second data, wherein the first data comprises the user file data; calculating the second data by adopting a Hash algorithm to obtain the second feature information; and establishing a corresponding relationship between the user archive data in the first data and the second feature information to obtain an aggregation feature information value. According to the method, the device and the apparatus provided by the embodiment of the invention, the problems of single evidence obtaining type, incomplete evidence and easy tampering and loss of the evidence in the prior art are effectively avoided, and the integrity, the safety and the traceability of the anti-electricity-stealing evidence are ensured, and therefore the problem that the judicial authority has obstacles and difficulty in determining the effectiveness of the anti-electricity-stealing evidence is solved, a judge can be assisted to determine the evidence, the judgment period is shortened, and the judgment efficiency is improved.