In complex electromagnetic environments，the diverse array of electromagnetic interference signals with varying modulation schemes leads to degraded performance in single-phase electric energy meters.With the random and dynamic characteristics of complex electromagnetic signals，a parametric model is established for m-sequence dynamic test signals.Subsequently，a structured measurement model for single-phase electric energy meters and a mathematical model for the impact of electromagnetic signals on single-phase electric energy meter errors are developed.The impact of electromagnetic signals on random interference in electric energy meters is then simulated.Finally，through simulation and experimental tests，the impacts of electromagnetic signals on measurement errors in single-phase electricity meters are analyzed.The research findings demonstrate that the proposed methodology effectively quantifies the impact of complex electromagnetic signals on measurement errors in single-phase electric energy meters.