本文首次报道了Ca4 YO(BO3) 3(YCOB)晶体的坩埚下降法生长。在 16 0 0～ 16 50℃炉温下 ,固液界面处的纵向温度梯度为 4 0～ 6 0℃ /cm ,以 0 .2～ 0 .6mm/h的生长速率 ,在近封闭的Pt坩埚中生长出了直径达 2 5mm、长度超过 50mm的完整透明YCOB晶体。介绍了生长工艺和原料制备 ,观察发现晶体中的主要宏观缺陷是包裹体。分析了包裹体生成的原因。 This paper reports the growth of Ca4 YO (BO3) 3 (YCOB) crystal by the crucible descent method. In the temperature range of 16 0 0 ~ 16 50 ℃, the longitudinal temperature gradient at the solid-liquid interface is 40 ~ 60 ℃ / cm, with a growth rate of 0.2 ~ 0.6mm / h in a nearly closed Pt crucible In the growth of the diameter of 2 5mm, the length of more than 50mm transparent YCOB crystal. The growth process and preparation of raw materials are introduced. The main macroscopic defects in the crystal are inclusions. The reason for the formation of inclusions is analyzed.