Abstract: A sealed ICP-AES system used to determine the metal elements in HLLW in glove box is set up. The 21 metal elements in HLLW are determined in the system. Many experiments concernning the preparation of reference samples, the selection of wavelenths of determined elements and the measure ment of samples have been done, the Radiation dose is measured in the analytical procedure. The ana lyrical results of some elements obtained by the method are in good agreement with other methods. The developments and improvements of the system applied in nuclear industrial field are discussed in the paper.