Abstract: ISOTOPES IN CHINA IN THE PAST FOURTY YEARS Wang Yishan Lu Yukai（Isotope Department, China Institute of Atomic Etomic Energy, Beijing 102413）ABSTRACT The effect of isotope and radiation technology to the national economy is expouded. The historyof china isotope development in the past forty years is retrospected. Both positive and negative experiences are also summarized. For future development proposals are offered here. Key words isotope radiation technology retrospect