With the increasingly fierce competition for space dominion world wide， the demand for high-performance， high-temperature-thermal-protection materials becomes more urgent. They can be specifically used for the critical space hypersonic vehicles， ballistic missile nose-cones and reentry capsules of manned spacecraft. Plus， the high-temperature physical and mechanical properties of traditional ultra-high temperature ceramics （UHTC） cannot be well balanced， it is urgent to develop new UHTC materials that can meet the needs of structural and functional integration for the increasingly stringent extreme environment. High-entropy ceramics， as a new research direction of high-entropy materials in ceramic field since high-entropy alloy has been widely studied in metal field， has attracted extensive attention in the past five years. This paper summarizes the research status of the high-entropy boride ceramic material systems including their preparation methods， normal-temperature and high-temperature physical properties， mechanical behaviors， high-temperature stability， and anti-oxidation behaviors. The service behaviors and research direction of high-entropy boride ceramics in extreme environments are studied and evaluated， which will enrich the system of extreme environmental materials.