Electromagnetic radiation is the phenomenon of electromagnetic energy in the form of electromagnetic waves propagating through space, and its propagation speed is commonly known as the speed of light. Electromagnetic radiation can be arranged into a number of frequency bands according to its wavelength and frequency, forming the electromagnetic spectrum. The higher the frequency, the greater the quantum energy of the radiation, and the stronger its biological effects. Electromagnetic pollution is another major pollution of human environment after exhaust gas, waste water, sludge and noise. With the rapid development of mobile communication technology, its electromagnetic wave signal using linear propagation, in urban high-rise buildings set up many liaison base stations, antennas, the formation of mutual cross-tuning interference, and some unreasonable antennas set up on the nearby high-rise residential electromagnetic wave pollution; transmission of electricity ultra-high voltage transmission lines and urban transportation system to increase electromagnetic pollution; in addition, home computers In addition, household computers, color TVs, audio, microwave ovens, induction cookers, wireless cell phones, electric blankets will be radiated electromagnetic waves, will also cause environmental electromagnetic pollution. If improperly used to cause harm to the human body, among them, microwave ovens, electric blankets should be particularly high alert to the hazards. Electronic products or equipment in the space formed by many electromagnetic waves not only interfere with each other, when reaching a certain intensity, in the invisible will produce harm to the human body.? Electromagnetic wave pollution can’t be seen, touched or smelled, but it is everywhere, and is a killer of human health. The intensity of 5 mW / cO ~ 10 mW / cO of electromagnetic waves, although the human skin feeling is not obvious, but can affect fertility and genetics. Women in the role of electromagnetic waves, menstrual cycle significantly changed, can cause miscarriage and genetic defects in pregnant women, can increase the incidence of cancer in children after birth. The incidence of cancer in children who are exposed to strong electromagnetic waves for a long time is two to five times higher than that in children exposed to low electromagnetic waves, and electromagnetic waves are also a cause of leukemia, lymphoma and brain tumors. The most directly and seriously affected by electromagnetic waves are the residents around TV stations, radio stations, radar communication stations (stations) and transmitting towers. These powerful electromagnetic waves can damage human blood and eyes, damage chromosomes, produce fetal malformations, and even cause central nervous disorders.