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In this paper, the solution of moment method is to calculate KCS of arbitrarily partially coated conducting objects by using triangle-roof function as base function from the electromagnetic field integral equations. Some special numerical treatments have been proposed to improve the accuracy of calculation. The asymptotic waveform evaluation (AWE) technique is combined with the method of moment (MOM) is to realize the fast evaluation of RCS of arbitrarily partially coated conducting objects in a wide band. The theory is verified by numerical results.