本文研究固液界面对单晶连铸表面质量的影响，结果表明，形成中心向液体中凸出形状的固液界面，且保证铸锭表面在离开铸型之后自由凝团是获得高的表面质量的必要条件铸锭中心凝固点与铸型出口的最大距离，取决于固液界面张力及液体的密度．单晶铝铸锭表面凝固点与铸型出口的最大距离应控制在2mm范围内，这一分析结果与试验结果吻合很好. In this paper, the effect of solid-liquid interface on the surface quality of single-crystal continuous casting is studied. The results show that solid-liquid interface with convex shape in the center of the liquid is formed and the free surface of the ingot surface is free from coagulation after obtaining the high surface quality Necessary conditions The maximum distance between the solidification point of the ingot center and the exit of the mold depends on the tension at the solid-liquid interface and the density of the liquid. The maximum distance between the solidification point on the surface of the single crystal aluminum ingot and the exit of the mold should be controlled within 2mm. The result of this analysis is in good agreement with the experimental results.