The　purpose　of　this　paper　is　to　study　the　microwave　thermal　ablation　and　propose　a　surgical　planning　methodology　for　patient-specific　spinal　tumor.　3D　realistic　geometries　including　the　spinal　tumor　and　the　surrounding　tissues　were　reconstructed　from　CT　images.　The　insertion　type　and　depth　of　microwave　antenna　were　then　decided.　The　specific　absorption　rate　(SAR)　of　microwave　antenna　was　established　by　measuring　the　temperatures　in　the　equivalent　phantom　experiments.　Numerical　simulation　was　carried　out　to　analyze　the　thermal　ablation.　Results　show　that　edge　of　54°C　is　included　in　the　tumor　initially.　The　healthy　tissue　is　beginning　to　be　injured　at　16　s.　At　240　s,　the　volume　of　injured　healthy　tissue　is　about　3520　mm3,　and　the　volume　ratio　of　54°C　field　to　the　whole　tumor　is　98.5%.　It　is　concluded　that　the　surgical　planning　methodology　can　provide　effective　prediction　and　theoretical　basis　for　clinical　treatment　of　patient-specific　spinal　tumor.