Remote field eddy current (RFEC) technique has been widely used for the inspection of ferromagnetic pipes and it's not restricted by the skin-depth effect. However, the technique under the sinusoidal excitation needs a long probe and a high power dissipation, which restricts the application of RFEC in real inspection. The pulse exciting signal has the advantages of rich frequency components, the disadvantages of the traditional RFEC can be overcome by using pulse excitation instead of sinusoidal excitation. On the basis of analyzing the principle of pulsed RFEC, the distributions of the magnetic field and eddy current around the pipeline and exciting coil are simulated and analyzed, the changing rule of transient state detecting signals in different field regions is studied and obtained with finite element simulation method, then, the remote field region is confirmed. The zero-crossing time and negative peak value are extracted as the eigenvectors for defect quantification. Finally, the performances of quantifying the axial defect length and depth by the pulsed RFEC are verified by performing an experiment, the result shows that this technique can be used to realize the quantitative estimation of the defect.