【Objective】 To study the thermal damage of mesenteric vascular tissues and hemostatic effects on goats with bipolar electrocoagulation under different powers. 【Methods】 173 case of mesenteric vessels of goats were performed bipolar electrocoagulations under different powers, and the thermal damage width and the success rates of electric coagulation of vascular occlusion for a single time were detected. 【Results】 From 55W to 80W, the power was lower, the thermal damage width was smaller (P < 0.05). The success rate was the highest and thermal damage width was the smallest under the 60W (P < 0.05). 【Conclusion】 The 60W may decrease thermal damage and has better vascular closure.