Purpose:　To　simulate　temperature　distribution　of　bone　tumor　during　radiofrequency　ablation　(RFA)　by　the　finite　element　method,　this　study　would　propose　a　treatment　to　assist　therapy　in　clinic,　and　improve　the　effect　of　radiofrequency　ablation.　Method:　We　employed　mode　of　thermoelectric　coupling　to　achieve　ablation　size,　and　got　the　50　degrees　C　temperature　curves　for　ablation　treatment　producing　by　applied　voltages.　Result:　When　the　high　temperature　ranges　from　90　degrees　C　to　100　degrees　C　in　more　than　10　min　heating　time,　the　applied　voltage　is　28　V,　created　the　47　mm　long　axis　and　34　mm　minor　axis　of　ablation.　Moreover,　by　increasing　the　heating　time,　the　area　of　ablation　was　augmenting.　Conclusion:　It　is　a　benefit　for　the　doctors　to　make　surgical　planning　and　consummate　the　results　from　this　study,　which　is　shown　in　the　50　degrees　C　of　temperature　distribution　of　bone　tumor　and　the　ablation　size.