Probiotics　have　a　variety　of　probiotic　effects.　However,　in　the　process　of　processing,　storage　or　digestion,　it　is　easy　to　reduce　its　activity　due　to　the　influence　of　external　adverse　environment.　The　use　of　microcapsule　technology　can　play　a　good　role　in　the　protection　of　probiotics　and　reduce　or　avoid　the　impact　of　adverse　environment.　As　a　wall　material　of　probiotic　microcapsules,　marine　polysaccharides　can　not　only　boost　the　stress　resistance　and　stability　of　probiotics,　improve　the　sensory　characteristics　of　probiotic　products,　but　also　enhance　the　therapeutic　effect　with　probiotics.　This　paper　analyzes　the　species　and　characteristics　of　marine　polysaccharides　from　different　sources.　It　also　summarizes　the　preparation　methods　of　marine　polysaccharide-based　probiotic　microcapsules,　and　expounds　the　application　of　marine　polysaccharide-based　probiotic　microcapsules　in　food　industry,　biomedicine,　aquaculture　feed　and　other　fields.　It　is　expected　to　provide　some　references　for　the　research　direction　of　probiotic　microcapsules　and　the　high-value　utilization　of　marine　resources.　©　The　Author(s)　2024.