Abstract: The single pulsed magnetic field is widely used in various high-energyaccelerators. The paper presents the measurement of the amplitude jitter of singlepulsed magnetic field and its measuring system controlled by microcomputer IBMPC/XT, which has been used in the measurement of the kicker and septummagnets in Hefei National Synchrotron Radiation Laboratory. The reduction ofthe error in the measurement and the improvement of the accuracy arediscussed.