The pulsed magnetic field measurement is an important researching content of the electromagnetic protection field and the basis in electromagnetic pulse (EMP) study. A new probe is designed using GMR chips. It has many advantages, such as, simple structure, small volume, wide measuring range, high frequency response etc. After calibration by experiments, the probe can be used to measure threedimensional pulse magnetic fields, intensity range of -40~+40 Gs, frequency range of 0~1 GHz. The magnetic signals, after converting into voltage signal, are collected and stored in SD card by TMS320F28335 DSP. Finally, through the CanBus network, the distributed pulse magnetic field measurement system is proposed. Experiments show that the system has advantages of small volume, flexible configuration, the large capacity of measuring point, strong antijamming capability.