As a kind of high-entropy ceramics, high-entropy boride ceramics have attracted more and more attention because of their excellent high temperature comprehensive mechanical properties and stability. However, there is no review on the research of high entropy boride ceramics. Therefore, the definition of high-entropy ceramics and the preparation methods of high-entropy borides were introduced. The application of first-principles calculations in the study of high entropy borides, the prediction of synthesis of high-entropy borides and the prediction and understanding of properties are summarized. The advantages and disadvantages of various preparation methods of high-entropy boride ceramic powders and bulks were comprehensively evaluated. Taking mechanical properties as the focus, various physical and chemical properties of high-entropy boride ceramics and their influencing factors and mechanisms were analyzed. At the same time, the shortcomings of high-entropy borides in theoretical calculation, preparation and exploration of material properties are summarized, and the possible future research directions were analyzed and prospected.