In this paper,the growth model of CdZnTe crystal is constructed based on the finite element method and the morphological evolution of the solid liquid interface under different shoulder angles is analyzed.The simulation results show that the change of the shoulder angle leads to the change of temperature gradient distribution in the shoulder area,which in turn changes the solid liquid interface morphology in the section.Among the four shoulder angles of 60°/90°/120°/150°,120° can obtain the flattest solid liquid interface of shoulder segment.As the growth proceeds,the difference of interface morphology corresponding to different angles gradually decreases,and all interface shapes tend to be consistent in the main ingot growth.The growth experiment of CdZnTe crystal is further carried out according to the model parameters.The results show that among the three shoulder angles of 90°/120°/150°,the single crystal rate of the ingot head is higher when the shoulder angle is 120°.