Description: Adopting unique high-tech circuits, anti-magnetic field interference structure and materials, it utilizes 2 parallel large treatment rings (Helmholts coil magnetic field coupling principle) to generate a pulsed magnetic field, and the treatment rings are automatically operated by a motor controlled by the host computer. The bed is equipped with 7 sections of bar-shaped therapeutic apparatus, and the power amplifier circuit outputs the excitation current, which excites the coil winding in each section of the therapeutic apparatus to generate the alternating magnetic field, reinforcing each other and generating a uniform alternating magnetic field in the space around the therapeutic apparatus.