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Dynamic forces are the main factor that influences the axle weight measurement accuracy of moving vehicle.Empirical mode decomposition (EMD) is presented to separate the dynamic forces contained in the axle weight signal. Theconcept and algorithm of EMD are introduced. The characteristic of the axle weight signal is analyzed. The method ofjudging pseudo intrinsic mode function (pseudo-IMF) is presented to improve the weighing accuracy. Numerical simulationand field experiments are conducted to evaluate the performance of EMD. The result shows effectiveness of the proposedmethod. Maximum weighing errors of the front axle, the rear axle and the gross weight at the speed of 15 km/h or lower are2.22%, 6.26% and 4.11% respectively.