Abstract: Objective To built a simple and easy biologic sample bank from irradiated people in nuclear accident, for the long time research of biological effect of low dose ionization radiation on people. Methods The blood sample is fixed on a piece of filter paper rand sealed up in plastic bottle for keeping, blood sample scribble on glass lice, fixed and dyed as routine clinic examination, and still, reserve a slice of hair of the examined people. Results Having built a biologic sample bank which from 1162 human body. The samples are come from 958 liquidators of Chernobyl nuclear accident, 46 people in other nuclear accident and 158 people as control groups. It is also having much information details. Conclusions If the biologic sample bank is combined with the modern bimolecular technique, maybe have much meaningful for the theory and practice of radiobiology.