The invention belongs to the field of metal surface modification and particularly relates to a method for preparing a Fe-Al-Cr coating through the combination of multi-arc ion aluminum technical plating, arc-added glow discharge chromizing and recoil ion implantation, wherein alloy elements are evenly distributed on the coating. The method includes the following specific steps that firstly, the surface of a steel product is treated in advance, ultrasonically washed and dried; secondly, the steel product is plated with Al through the multi-arc ion plating technology; thirdly, chromizing is performed through the arc-added glow discharge technology; and fourthly, a thin film on the surface of a material is bombarded through the recoil ion implantation technology. By the adoption of the method, a high Al brittle phase near the subsurface of the coating can be prevented from being separated out, it is guaranteed that three alloy elements of Fe, Al and Cr are evenly distributed in the section direction, the service life of the coating is prolonged, and the high temperature oxidation resistance and the abrasion and wear resistance of the coating are particularly improved.