Printers in the off state usually no radiation, when the printer works, there will be a small amount of radiation exists, but the radiation is small and not harmful. Most of the printers on the market in line with national regulations indicators, the amount of radiation in the national permit range, there is no significant impact on the human body. Printers have inkjet printers, needle printers and laser printers. The first two types of printers have a small amount of radiation, almost no effect on the body; laser printers have a relatively large amount of radiation, but simply a laser printer will hardly cause maternal and fetal damage, if maternal in a printer-intensive environment, it is recommended to keep a certain distance from the printer, and wear protective clothing in advance, can properly prevent radiation. The toner in the printer is easy to inhale for a long time or too much at once, causing respiratory illnesses. High temperature melting toner particles so as to achieve printing, there will be a certain odor, this smell is harmful to the human body. Laser printers work due to the role of high-voltage electrostatic field and produce a large number of benzo(a)pyrene, dimethyl nitrosamines and other organic waste gas filled in the surrounding area, can be disease-causing, teratogenic, carcinogenic hazards. Therefore, the amount of printer radiation is related to the type, radiation are small, normal use of the human body usually does not cause significant impact.