本文观察了大鼠双后足不同程度的局部冻伤后，其血小板计数及血小板聚集率的改变。结果表明，冻伤后大鼠血液中血小板数及血小板聚集率均呈增加趋势，其程度与冻伤程度有密切关系，冻伤愈重，增加愈明显，恢复亦愈慢。结果提示，冻伤可引起血小板功能发生改变，这对冻伤组织的血液凝固性质的改变及血栓形成而导致冻伤组织坏死的病理过程具有重要作用。 In this paper, the changes of platelet count and platelet aggregation in rats with different degree of local frostbite were observed. The results showed that the number of blood platelets and platelet aggregation rate of rats increased after frostbite, the degree of frostbite is closely related to the degree of frostbite, the heavier the frostbite, the more obvious the increase and the slower the recovery. The results suggest that frostbite can cause changes in platelet function, which has an important role in the changes of blood coagulation and the pathological process of thrombosis leading to necrosis of frostbite tissue.