The invention provides a permanent magnet for loudspeaker, each component and the mass ratio between the components are: neodymium 1.5%-2.5%, titanium 2.1%-3.5%, boron 3%-7%, yttrium-iron alloy 0-3%, The kaolin is 1%-8%, and the balance is iron oxide. The preparation method includes five steps of material mixing, oxidation treatment, static pressing, roasting and grinding. The invention has simple process, low requirements on production conditions, and the cost of raw materials is relatively lower than that of traditional magnets, so it can help to carry out the production and preparation of magnets flexibly and efficiently, and help reduce the production cost of magnets. At the same time, it is also effective The magnet density and structural strength are greatly improved, the internal grain stability of the magnet is good, the maximum magnetic energy product is high, and the coercive force of the magnetic induction is strong, which can effectively improve the service life and sound quality of the speaker, and help improve the quality of the speaker .