The invention discloses a method for calculating a pulse constant of a standard electric energy meter in a testing process, and the method comprises the steps: estimating a pulse constant Cx under thecondition that a pulse constant of a tested meter is unknown, setting that n pulses causes one error, wherein there is one relative error gamma*x corresponding to the error; expressing the error gamma*x of the electric energy meter through the relative error, wherein the pulse constant of the standard electric energy meter is Cb=Cx*(1+gamma*x). According to the invention, the method achieves theestimation of the pulse constant of the tested electric energy meter, achieves the detection of the tested meter according to the estimated pules constant through the standard electric energy meter method, and achieves the calculation of the correct pulse constant of the standard electric energy meter through the test error generated in a testing process. In the detection process of the standard electric energy meter, the method reduces the time in searching a specification through the correct calculation of the pulse constant, and guarantees the quick and smooth execution detection of the electric energy meter.