A computational electromagnetic model for target coating withplasma is presented, based on the assumption that plasma medium iscold, unmagnetized, collisional and inhomogeneous. In a high frequencyregion, the laminar flow plasma which shields target can be treated aslayered plane media. In each layer, the plasma is equivalent to auniform dielectric. Physics optics (PO) and Impedance boundarycondition (IBC) are applied to calculating the backscattering field,which is implemented by visual Graphical electromagnetic computing(GRECO) method. Numerical results illustrate that the target coatingwith plasma is a valid measure to reduce the Radar cross section (RCS)of target. This conclusion has revealed a broad prospect for plasmastealth and anti stealth.