Ultra-short-wave therapy instrument is a traditional therapeutic instrument, which uses electron tube oscillation to generate ultra-short-wave high-frequency electric field to carry out the treatment of instrumentation. Usually the wavelength 1 ~ 10m, frequency 30 ~ 300MHz radio frequency current called ultra-short wave current, for clinical use called ultra-short wave therapy. In Europe and the United States due to short-wave and ultra-short-wave is not defined, so commonly known as short-wave or radio frequency. Most of the equipment through the capacitive electrode output energy, the affected part is placed between the electrodes, under the action of high-frequency electric field, so that the molecules and ions in the lesion area in its parallel position vibration, and friction with each other and produce thermal effects. This thermal effect makes the affected area of the surface and deep tissue uniform heat, can enhance vascular permeability, improve microcirculation, regulate endocrine, strengthen the organization of the body's metabolism, reduce the excitability of the sensory nerves, so as to achieve the antibacterial, anti-inflammatory, analgesic, antispasmodic, promote blood circulation and repair, and enhance the immunity of the body's therapeutic purposes.