Objective.　The　purpose　of　this　study　was　to　find　the　correlations　between　B-mode　ultrasonic　tissue　texture　features　and　tissue　temperature　in　microwave　ablation.　Methods.　A　total　of　20　in　vitro　porcine　liver　samples　were　used　for　microwave　ablation　experiments.　B-mode　ultrasonic　images　under　various　temperatures　were　acquired.　The　texture　features　of　the　differential　images　based　on　the　gray　level　histogram,　including　the　mean　of　the　gray　scale　(MGS),　standard　deviation　of　the　gray　scale,　and　entropy　of　the　gray　scale　(END,　and　those　based　on　the　gray　level　co-occurrence　matrix,　including　the　contrast　(CON),　angular　second　moment　(ASM),　inverse　difference　moment　(IDM),　and　correlation,　were　extracted.　Correlations　between　the　features　and　liver　sample　temperature　were　analyzed.　In　addition,　water　bath　heating　experiments　were　also　performed　on　15　in　vitro　porcine　liver　samples　for　analysis　validation.　Results.　The　correlation　coefficients　across　the　MGS,　ENT,　and　ASM　in　4　directions　(0　degrees,　45　degrees,　90　degrees,　and　135　degrees),　the　CON　and　IDM　in　3　directions　(45　degrees,　90　degrees,　and　135　degrees),　and　a　temperature　range　of　15　degrees　C　to　90　degrees　C　were　high　and　greater　than　0.9　during　microwave　ablation.　All　texture　features　of　the　differential　B-mode　ultrasonic　images　changed　with　rising　temperature　from　25　degrees　C　to　60　degrees　C　during　water　bath　heating.　Conclusions.　Changes　in　image　features　reflect　changes　in　tissue　temperature　during　microwave　ablation.