In view of the existing electromagnetic flowmeter conductivity measurement methods, there are problems such as low measurement accuracy, time-sharing of additional excitation and magnetic excitation, which affect the real-time flow measurement. This paper proposes a parallel excitation electromagnetic flowmeter conductivity measurement method. The single pulse square wave capacitive coupling manner is adopted in the excitation part, which can be with magnetic field excitation in parallel. The flowmeter signal and the electrical conductivity can be measured in the same time. The band-pass filter and the method based on energy attenuation are given, which improve the precision and stability of conductivity measurement. The flow velocity measurement shows that the conductivity and the flow can be measured simultaneously with parallel excitation, and the conductivity measurement is accurate to 3% within the range of 100 μS / cm~ 3 mS / cm, the flow calibration precision is better than 0. 5 level.