Magnetic therapy is a method to treat diseases by using magnetic field to act on human body. Everything in the world, from elementary particles to celestial bodies, has certain magnetism. The earth itself is a huge magnetic field. Magnetic cutting phenomena are all caused by moving charges, and the essence of magnetic phenomena is the movement of charges. A magnetic field exerts a force on a charge, and one magnetic field exerts a force on another. Magnetic field produces Lorentz force on moving charge and Ampere force on current-carrying conductor. Magnetic field can change the direction of orbital magnetic moment and spin magnetic moment of atoms and molecules; Through electromagnetic induction, the magnetic field can also make the conductor produce induced electromotive force and induced current. All living things and human bodies on the earth are influenced by the geomagnetic field, which has become an indispensable environmental factor for living things to maintain normal life activities. As early as the Eastern Han Dynasty, people found that magnetic fields could treat many diseases. It is recorded in Shennong Herbal Classic, a medical book in the Eastern Han Dynasty, that magnets are pungent and cool, which can cure swelling and pain of limbs, rheumatism paralysis and heat-induced deafness. At present, China's medical community is also exploring the use of magnetic therapy to treat hypertension, trigeminal neuralgia, facial paralysis and so on. It can also be used to treat insomnia and neurasthenia. Ancient Rome used magnets to treat hand and foot pain and spasm, and ancient Greek doctors used magnets to treat diarrhea. 1 1 century, Arab doctors used magnets to treat edema, liver and spleen diseases, baldness and so on. At the end of 19, there were patents for magnetic therapy equipment such as magnetic chair, magnetic bed, magnetic cap and magnetic tape abroad. In recent 20 years, the biological function of magnetic field has been extensively studied at home and abroad, including its application in disease treatment and diagnosis, magnetic hygiene, magnetic ecology, biomagnetism and so on. , and made remarkable progress.