The invention relates to high-performance magnetic-conductive alloy for an electroacoustic device, and a preparation method of the high-performance magnetic-conductive alloy. The alloy comprises the following chemical components in percentage by weight: 20.0 to 40.0 percent of Co, 0.2 to 1.5 percent of B, 0.10 to 0.25 percent of Mn, 2.0 to 4.0 percent of Zr, 0.2 to 1.0 percent of Ni, 1.0 to 2.5 percent of V, less than or equal to 0.15 percent of Si, less than or equal to 0.2 percent of Cu, less than or equal to 0.01 percent of C, less than or equal to 0.01 percent of P, less than or equal to 0.01 percent of S and the balance of Fe. The alloy is prepared by the following steps: performing composition proportioning, performing vacuum induction furnace smelting, performing vacuum self-consumption remelting, performing forging processing and performing heat treatment. Compared with the prior art, the alloy improves the temperature stability on the premise of maintaining high-saturation magnetic induction intensity and has two advantages of high saturation and temperature stability, so that the alloy can be used cooperatively with permanent magnetic alloy, the magnetic field intensity and the temperature stability are improved, and the sound intensity and the tone quality of the electroacoustic device are improved.