The invention relates to a method for metal effect inhibition of X-ray dual-energy CT (computer tomography) imaging. The method comprises the following steps of (1) carrying out the X-ray dual-energy scanning on a luggage, to obtain the dual-energy projection data; (2) determining a metal projection area in the dual-energy projection data; (3) utilizing the dual-energy projection data outside the metal project area to carry out iterative reconstruction; (4) obtaining a CT slice with inhibited metal effect, and calculating the atom coefficient information according to the dual-energy imaging principle. The method for the metal effect inhibition of X-ray dual-energy CT imaging method has the beneficial effects that the strip artifact of the CT slice is reduced, and the atom coefficient detection precision of a metal object during existence is improved.