The structure of RE-Ag alloy was observed and analyzed using electron probe. The property changes of the alloy containing two rare earth elements AgLaY during cold forming and the high temperature softening-resistance dur- ing annealing were studied using Vickers hardness tester. The distribution and action of the rare earth elements in Ag- alloy were also analyzed. Experimental results show that AgLaY alloy has more remarkable work-hardening effect than AgLa and pure silvet, and it also has better thermal-resistance. The effects of RE elements, La and Y, on the properties of Ag-alloy are attributable to their symbiotic distribution and complementary function. Because of the common proper- ties of La and Y as RE elements, they have the completely similar distribution in Ag-alloy. At the same time, La and Y make full use of complementary role in the alloy since they belong to different periods in periodic table and have differ- ences in atomic structure and properties. The structure of RE-Ag alloy was observed and analyzed using electron probe. The property changes of the alloy containing two rare earth elements AgLaY during cold forming and the high temperature softening-resistance dur- ing annealing were studied using Vickers hardness tester. The distribution and action of the rare earth elements in Ag-alloy were also analyzed. Experimental results show that AgLaY alloy has more remarkable work-hardening effect than AgLa and pure silvet, and it also has better thermal-resistance. The effects of RE elements, La and Y, on the properties of Ag-alloys are attributable to their symbiotic distribution and complementary function. Because of the common proper- ties of La and Y as RE elements, they have the completely similar distribution in Ag-alloy. At the same time , La and Y make full use of complementary role in the alloy since they belong to different periods in periodic table and have differ- ences in atomic structure and properties.