A horizontal-fall metal jig is suitable for luring fish with a fall action, which is the standard for horse mackerel fishing, but a horizontal-fall metal jig has poor bottom-catching performance. Therefore, in order to speed up the fall speed of the metal jig in the water and improve its bottom-catching performance, the center of gravity is designed to lean forward in free fall. In addition to the forward leaning center of gravity, assist hooks are attached at the front and rear of the jig so that the jig can maintain a horizontal posture by tension fall during lift and fall after landing on the bottom, which can produce a slow fall, a basic technique for horse mackerel fishing.