本发明属于金属材料及其制备技术领域，公开了一种层/棒状共晶高熵合金及其设计方法和制备方法。所述制备方法为：获取共晶合金体系的合金成分和共晶组织形态，建立数据库；筛选具有层片状共晶和/或棒状共晶的共晶合金体系候选集，获取共晶点成分并确定关键合金元素；确定掺杂合金元素候选集对关键合金元素进行部分替代，按照预定义原子摩尔比含量形成共晶高熵合金体系，筛选得到符合6 .5<VEC<8 .38，‑18< Δ Hmix<‑6且熔点差满足≤35℃要求的层/棒状共晶高熵合金。本发明的设计方法操作简便，无需经过复杂的计算或公式推演，也无需进行二次设计，本能够快速确定合金体系形成共晶的区间，效率高且成功概率高。

The invention belongs to the technical field of metal materials and their preparation, and discloses a layer/rod eutectic high entropy alloy and a design method and a preparation method thereof. The preparation method is as follows: obtaining the alloy composition and eutectic microstructure of the eutectic alloy system, and establishing a database; The candidate sets of eutectic alloy systems with lamellar and/or rod-like eutectic were screened, the eutectic point compositions were obtained and the key alloying elements were determined. The key alloying elements were partially replaced by the candidate set of doped alloying elements, and the eutectic high-entropy alloy system was formed according to the predefined atomic molar ratio content. The layer/bar eutectic high-entropy alloy meeting the requirement of 6.6 <VEC< 8.38, ‑18< ΔHmix <‑6 and the melting point difference meeting the requirement of ≤35℃ was screened. The design method of the invention has the advantages of simple operation, no complicated calculation or formula deduction, and no secondary design, and can quickly determine the eutectic formation interval of the alloy system, with high efficiency and high probability of success.