The high?temperature eutectic point（HTEP）crucible is made of graphite material with low structural strength, so it is prone to fracture after reproducing test, causing HTEP crucible damage. Durability of crucibles has become one of the main obstacles for HTEP to enter the next generation of temperature scale. In order to solve this problem, in this article, the stress situation of the crucible is analyzed based on ANSYS, and the theoretical positions of the main stress points of the crucible are clarified. Then, combined with the actual fracture situation of various HTEPs, the reasons for the fracture of different types of eutectic point crucibles are analyzed. Two improvement plans for HTEP crucibles are proposed: improved Hybrid structure and flow?guide?cover structure. Finally, some new high?temperature eutectic/peritectic points are made by using an improved structure crucible, and no damage issues are found after reproducing test, which has preliminarily verified the effectiveness of the improvement.