探讨了单相合金高温形变再结晶后连续冷却条件下正常晶粒长大问题。结合传热学及晶界迁移理论证明，在连续冷却条件下晶粒的长大满足关系。进一步的理论分析表明，在连续冷却条件下，晶粒的长大存在因温度连续变化而形成的极限尺寸ｄ＿ｍ，以及相应的临界时间τ＿ｃ。试验结果与上述理论吻合较好。 The problem of normal grain growth under continuous cooling after single-phase alloy high temperature deformation recrystallization was discussed. According to the theory of heat transfer and grain boundary migration, the grain growth under the condition of continuous cooling satisfies the relationship. Further theoretical analysis shows that under the condition of continuous cooling, the grain size growth has the limit size d_m due to the continuous change of temperature, and the corresponding critical time τ_c. The experimental results agree well with the above theories.