The metal jig is a kind of metal lure for angling. It has a variety of appearances, with various color coatings and reflective treatments. Through different shapes and structures such as the fishing line loop at the tail, it can produce a strong reflection in the water. Its working principle is to sink by its own weight and show different movement postures such as jumping and swinging through the angler's control, imitating the movements of injured aquatic organisms to attract fish. It is suitable for a variety of water areas, including both saltwater and freshwater. It performs especially well in deep water areas and fast - flowing currents, and can be used to catch various predatory fish such as tuna and bass. When operating, attention should be paid to the casting force and angle, and the retrieving speed should be adjusted according to the fish situation, with appropriate rod - jerking actions.