Radioactive pollution refers to the occurrence of radioactive substances or rays that exceed national standards on the surface or inside of materials, human bodies, places, and environmental media due to human activities. The harm of radioactivity to biology is very serious. Radiation injury has acute injury and chronic injury. If people are exposed to large doses of X-rays, gamma rays and neutrons in a short period of time, they will cause acute injury. Mild cases have symptoms such as hair loss and infection. When the dose is larger, gastrointestinal damage such as diarrhea and vomiting may occur. Under extremely high doses of radiation, central nervous system damage occurs until death. For the central nervous system, the main symptoms include weakness, fatigue, lack of desire, collapse, lethargy, etc. In severe cases, the whole body muscles tremble and cause epileptiform spasm. The small intestine with vigorous cell division is highly sensitive to ionizing radiation.