Abstract: The cold trap is usually used to purify impurities in sodium in sodium-cooled fast reactor. The purification capacity of cold trap in China Experimental Fast Reactor (CEFR) is not satisfied with the requirement of Demonstration Fast Reactor (CFR600). The dissolved rate at different temperatures, purification rate, collection capacity and impurity capacity for cold trap were obtained in the paper. All of these performance indices achieve the expected value. The collection capacity for purification capacity experiment of high performance cold trap for CFR600 is 2.33 times of that of cold trap of the first loop in CEFR, and is 1.91 times of that of cold trap of the second loop in CEFR. The experimental result provides the basis for the optimal design of the cold trap structure in CFR600 and the development of analysis software of cold trap performance, which meets the needs of key equipment in purification system in CFR600, including the first loop, the second loop and the spent module transforming cylinder sodium purification loop. The high performance cold trap studied by ourselves will be used in CFR600.