The invention discloses a metering circuit for a multichannel AC digital electric energy meter. The metering circuit for a multichannel AC digital electric energy meter is characterized in that an input terminal is connected with a loop to be measured; an output terminal is connected with a data input terminal of a main control chip; a control terminal is connected with a chip selection terminal of the main control chip, is connected with a power supply module, and includes a 12-channel voltage acquisition unit, a 12-channel current acquisition unit and four metering chips; the 12-channel voltage acquisition unit acquires the voltage signals of a 12-channel loop to be measured; the 12-channel current acquisition unit acquires the current signals of the 12-channel loop to be measured; and the input terminal of each metering chip is respectively connected with the output terminal of a three-channel voltage acquisition unit and the output terminal of a three-channel current acquisition unit. The metering circuit for a multichannel AC digital electric energy meter overcomes the defect of time sharing metering of an existing multi-loop electric energy meter, so that the measuring accuracy is greatly improved; the active power achieves 0.1S; and the reactive power achieves 0.2S.