Formaldehyde is a gas harmful to the human body usually stipulates that if the content of formaldehyde released per cubic meter of air shall not be greater than 0.08mg, if in 0.1-2.0mg, there is an odor to people and 50% of normal people will be able to perceive through the sense of smell and bleeding, there is a certain degree of harm to the human body. Therefore formaldehyde 0.16mg although not a serious formaldehyde content is too high, but will also produce a certain harm to the human body, because formaldehyde to the standard of 0.16mg, it will cause certain harm to the digestive tract, eye mucosa, tracheal mucosa, respiratory tract mucosa. If a person is in a room with formaldehyde content of 0.16mg for a long time, it will cause eye discomfort, coughing and coughing, etc. It will also cause tears, chest tightness, shortness of breath, palpitations, and even dizziness and headache, etc. It is necessary to apply activated carbon or cultivate green plants, or open doors and windows to carry out the release of formaldehyde.