When scattering object is a thin wire, especially with its radius much smaller than space cell of FDTD, the combination of the method of inductance in-cell with FDTD is useful to deal with the EMP coupling to wire. In this paper we calculate the three kind of EMP(UWB、FREMP、NEMP)coupling to thin wire by it, and the induced currents in the midpoint of wires are attained.