The invention provides a quartz crucible for growing CsI(T1) crystals, which belongs to the field of nuclear detection, homeland security and military. According to a natural elimination principle ina crystal growth method, the bottom shape and integral overall appearance of the quartz crucible for growing the crystals are integrally designed, and a large-sized quartz crucible having special requirements for an external size and internal size can be obtained. Compared with the traditional method, the produced large-sized CsI(T1)/CsI flash crystal is high in finished product rate/yield; and compared with the traditional method for spraying a layer of special material into the crucible in other manufacturers, the method is simple in process, and relatively low in cost.