The invention relates to a multi-meter mutual detection method for electric meter measurement accuracy. A load current Ii of a current meter is fed back to a neutral line of a next meter, a neutral line of the next meter has increment, through the increase and a feedback ratio, a load current Ij of the meter can be measured by the next meter, the two current values are theoretically the same, however, the two always have deviation E, if a problem of measurement of a certain energy meter occurs, that is, when a measurement value is enlarged (or reduced) m times at a certain time, that the average current value through self measurement and an average current value of a previous meter monitored are enlarged (or reduced) m times can be easily derived. The method is advantaged in that the meters in an operation state mutually monitor each other, high real-time performance is achieved, fault tables can be rapidly positioned, measurement losses or disputes are reduced, only adding a few current transformers is needed, and cost is relatively low.