本文采用Ｗｉｓｔａｒ大鼠和１３７Ｃｓγ射线辐射源，给予妊娠大鼠小剂量Ｄ１照射后２４ｈ再给予其损伤剂量Ｄ２照射，观察其仔鼠条件饮水反应达标率、海马锥体细胞及大脑锥体细胞计数对γ辐射的适应性反应。结果表明，小剂量γ辐射可以诱导大鼠神经系统产生适应性反应，且反应幅度与Ｄ１剂量呈线性负相关。 In this paper, Wistar rats and 137Csγ-ray radiation source were given to pregnant rats exposed to low doses of D1 for 24 hours and then irradiated with D2 dose. The drinking water compliance rate, pyramidal cells and pyramidal cell counts γ radiation adaptive response. The results showed that a small dose of γ-radiation induced an adaptive response to the nervous system in rats, and the magnitude of the response was negatively correlated with the dose of D1.