Abstract: The technique of using multiresolution-time-domain (MRTD) method to solve the issue of electromagnetic pulse (EMP) coupling to thin wires was researched. Traditional Holland method was applied to MRTD, and a scheme in MRTD was produced to calculate the EMP coupling of thin wire structures. The computational process of the scheme was presented as well as correlative parameters. The result indicates that the maximum space step length which is equal to a quater of the smallest wavelength can be employed in the MRTD scheme with computational resources being saved effectively, MRTD is suitable to deal with the thin wire-EMP coupling in condition of thin wires being laid on ground surface, and the MRTD scheme is a proper way to compute ground-laying thin-wire issue.