The invention relates to a battery consistency screening method. The battery consistency screening method comprises the following steps of S1, enabling n to-be-screened single batteries to be connected in series to form a battery pack, wherein n is greater than 1; S2, performing constant-current charging and discharging on the battery pack, recording voltages of each single battery in the batterypack at three moments, wherein the three moments include charging end t<1>, a discharging end t<2> and a relaxation predetermined time end t<3>; S3, calculating the standard difference and a standard difference coefficient of the voltages of the n single batteries at the three moments separately, wherein is equal to a formula as shown in the specification, and is equal to a formula as shown in the specification; the V is the voltage of the i single battery at a certain moment, and the formula as shown in the specification is the average voltage of the n single batteries at the same moment; and S4, selecting the moment with the maximum standard difference coefficient, selecting the single battery which can satisfy the formula which is as shown in the specification according to the standard difference at the moment, wherein N is greater than 0 and less than or equal to 1.