Anti-aging property of exterior architectural latex coating modified by composite of nano-TiO_2/SiO_2 and nano-ZnO/SiO_2 was studied. The experimental results show that anti-aging property of that modified by composite of nano-TiO_2/SiO_2 is improved much more than that modified by composite of nano-ZnO/SiO_2. The UV absorption in the UV-Vis spectrum of composite of nano-TiO_2/SiO_2 is 93% or higher, which leads to improve anti-aging property of exterior architectural latex coating.