Computer radiation is harmful to human body because computers have certain radiation sources, including keyboards, computer screens and hosts, which are all very strong radiation sources (ⅰ, keyboard 1000V/m, ⅱ, mouse 450 V/m ⅲ, screen 2 18V/m, ⅳ, host1700 V/m). To sum up, radiated electromagnetic waves have eight hazards to human body. ① Promote cell canceration. Computer radiation pollution will affect the immune, reproductive and metabolic functions of human circulatory system, and even induce cancer and accelerate the proliferation of cancer cells in human body. ② Hormone abnormality affects human reproductive system. The main manifestations are the decline of male sperm quality, spontaneous abortion of pregnant women and fetal malformation. (3) Severe loss of calcium ions. Sitting indoors for a long time, rarely basking in the sun, the body lacks "sunshine vitamin-vitamin D". Because vitamin D contributes to the absorption, storage and utilization of calcium, lack of vitamin D will lead to the loss of calcium. (4) The reason of dementia, some computer workers who stay up late often lie in front of the computer to have a rest. If you don't turn off the computer when you rest, just turn off the screen, you can't stop the radiation, and when you sleep on your stomach, the radiation directly facing the computer will cause dementia through your brain. ⑤ Abnormal pregnancy and abnormal abortion. According to a special report published by Professor Xie Xieqing in tulane university, USA, extremely low pulsed electromagnetic field is one of the main causes of hematological tumors, pregnant women's abortion, stillbirth and deformed children. ⑥ Hypertensive heart disease, radiation affects people's cardiovascular system, showing palpitation, insomnia, menstrual disorder, bradycardia, decreased cardiac blood volume, irregular sinus heart rate, leukopenia and decreased immune function in some women. ⑦ Electromagnetic wave allergy, when the monitor is turned on, an electrostatic field will be formed around it, which will almost suck the dust suspended in the air of the whole room into its own field, thus stimulating facial skin and causing allergic skin rash. (8) The increase of suicides, high concentration in the process of operating the computer, rapid and frequent movements of eyes and fingers, make the physical and psychological burden too heavy, resulting in dreaminess, neurasthenia, head pain, decreased immunity, and even induce some mental diseases. Such people tend to lose self-confidence, and are often nervous, irritable and anxious.