With Digital input electricity meters is more and more widely used in electric energy metering system of smart substation, it’s so important to establish a set of complete calibration system. Because of this , lots of calibration method of digital input electricity meters have been developed at home and abroad.This paper analyse the calibration items and error causes of digital input electricity meters, the detection method and design scheme based on digital output power source and standard digital input electricity meters is emphasisly discussed.According to the China Standard, “GB/T 17215.303-2013 Electricity metering equipment (a.c.)-Particular requirements-Part 3: Digital input electricity meters” ,which required that digital input electricity meters can record the abnormal working condition of the input sampled value. This paper put forward a detection method to calibrate the event record and meter accuracy of digital input electricity meters,which based on simulate a network abnormalities condition of merging unit . This solution is useful to cut down the difference between the laboratory test and field test accuracy.