EBCs　were　coated　on　the　surfaces　of　SiC-CMCs　to　effectively　isolate　the　engine　corrosive　environment　and　avoid　rapid　corrosion　failure　of　the　components,　which　become　the　key　for　the　applications　of　SiC-CMCs　to　hot　section　components　of　gas　turbine　engines.　However,　interconnected　pores　were　formed　in　coatings,　causing　rapid　degradation　in　a　combustion　environment　containing　high-temperature　water　vapor　and　oxygen.　The　research　progresses　of　the　effects　of　EBCs　materials　properties,　preparation　technologies,　and　processing　parameters　on　the　pore　structure　were　summarized.　The　effects　of　pore　structure　on　the　water　vapor　corrosion　resistance　was　analyzed,　and　the　research　progresses　of　EBCs　densification　were　summarized.　Finally,　future　research　on　the　preparation　of　dense　EBCs　to　improve　their　water　vapor　resistance　was　prospected.　©　2022,　China　Mechanical　Engineering　Magazine　Office.　All　right　reserved.