The invention relates to a method for recovering a calibration state of a detached electric energy meter, and is realized specifically by adoption of the following technical scheme, including the steps of: (1) performing automatic wiring on the detached electric energy meter, and testing whether strong current and weak current wiring is correct; (2) reading the meter number of the detached electric energy meter through RS485, and inquiring electric energy meter asset information, and determining the meter to be an state grid electric energy meter of 09 version or 13 version; (3) for the electric energy meter of 09 version, performing automatic energization, and adopting a mechanical card insertion mode to carry out detection; (4) for the electric energy meter of 13 version, carrying out detection in an RS485 communication mode; (5) testing equipment detecting whether the electric energy meter of 09 version and the electric energy meter of 13 version are successful in parameter presetting through RS485; and (6) if parameter presetting succeeds, indicating that calibration state recovery succeeds, and carrying out automatic wire removal. The method for recovering a calibration stateof a detached electric energy meter overcomes the problem that batteries of a large number of detached electric energy meters are undervoltage and thus calibration states cannot be automatically recovered, and can recover the calibration states of the detached electric energy meters accurately and quickly in batches, thereby providing an effective technical support for realizing automatic sortingof the detached electric energy meters.