Nano-sized　20%RuO2-80%SnO2　materials　were　synthesized　by　the　citrate-gel　method　using　RuCl3,　SnCl2,　SnCl4　and　citric　acid　as　precursor　and　anhydrous　ethanol　as　solvent.　The　structures　of　the　derived　powders　were　characterized　by　XRD,　TEM　and　BET　techniques.　It　is　shown　that　the　materials　obtained　were　composed　of　rutile-type　oxide　phases　with　fairly　narrow　distribution　in　size　and　good　thermal　resistant　properties.　(Ru,　Sn)　O2　with　sizes　of　about　10nm　was　obtained　when　SnCl2　was　used　as　source　material.　Rutile-type　mixed　oxides　of　SnO2　and　RuO2　was　obtained　while　SnCl4　was　used　as　source　material.　Sn　ions　can　effectively　increase　the　temperature　that　metal　Ru　was　formed.　It　is　above　the　temperature　of　450-550°C　at　which　the　Ti　anode　was　commonly　prepared.　The　ultrafine　SnO2　effectively　destroyed　the　preferred　orientation　structure　of　RuO2,　which　improved　the　dispersing　abilities　and　sizes　of　powders　and　would　control　the　growth　tendency　of　RuO2.　The　surface　areas　of　the　powders　heated　at　400°C　for　1　h　were　bigger　than　that　of　600°C.　The　powders　using　SnCl2　as　precursor　had　a　bigger　surface　area　than　that　of　SnCl4.