The invention belongs to the technical field of electromagnetic shielding and discloses a method for preparing a soft magnetic alloy coating which has a good magnetism conducting function. The method for preparing the soft magnetic alloy coating comprises the steps of grading of soft magnetic alloy powder, heat treatment of soft magnetic alloy powder, material proportioning, molding and solidification. The soft magnetic alloy coating prepared through the method has a good initial magnetic conductivity under a direct-current magnetic field and can be applied to the field of low-frequency magnetic field shielding; in addition, the coating preparing technique is simple, processing is easy, and the coating is suitable for shielding products in any shapes.