By means of laying the equivalent heat source at the cvack tip in a thin current plate,the complex analysis solution of temperature field around the crack tip was given.It is the basis to solve the stress field of a crack tip.%采用对通电瞬间的导电薄板中绝热裂纹尖端放置等效热源的方法，给出了温度场的复变函数解，从而确定了裂尖附近的温度分布，为进一步确定裂尖附近的应力场奠定了基础。
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