The　utilization　of　industrial　solid　waste　for　thermal　energy　storage　represents　an　innovative　approach　to　address　environmental　challenges　while　advancing　energy　storage　technologies.　This　review　comprehensively　examines　the　potential　of　industrial　solid　wastes,　including　coal　fly　ash,　red　mud,　sewage　sludge,　gypsum,　metallurgical　slag,　and　waste　concrete,　as　thermal　energy　storage　materials.　The　discussion　encompasses　the　material　properties,　preparation　methods,　and　applications　of　industrial　solid　wastes　in　both　sensible　and　composite　heat　storage　systems.　The　study　highlights　their　capacity　for　high-temperature　stability,　enhanced　thermal　conductivity,　and　phase　change　material　integration,　offering　significant　energy　density　improvements.　Moreover,　the　review　identifies　challenges　such　as　material　heterogeneity　and　long-term　thermal　cycling　performance.　Strategies　for　industrial　solid　waste　modification,　encapsulation　of　phase　change　materials,　and　innovative　composite　designs　are　analyzed　to　enhance　their　applicability　in　sustainable　thermal　energy　storage　systems.　This　work　aims　to　provide　a　foundation　for　future　research　and　industrial　applications,　emphasizing　the　dual　benefits　of　environmental　protection　and　energy　efficiency　improvement.