In　this　study,　a　newly　established　bench-scale　thermophilic　continuously　stirred　fluidized　bed　reactor　(CSFBR)　was　applied　for　anaerobic　co-digestion　of　food　waste　(FW)　with　grease　trap　waste　(GTW).　The　performance　of　CSFBR　regarding　stability　and　treatment　efficiency　was　inspected　through　a　laboratory　contrast　experiment　with　two　traditional　continuous　stirred　tank　reactors　(CSTRs).　In　the　OLR　range　of　3.19–7.41　g　COD/L/d,　the　methane　production　rate　of　the　thermophilic　CSFBR　was　about　as　high　as　that　of　the　thermophilic　CSTR.　Nevertheless,　the　thermophilic　CSFBR　had　much　lower　VFAs　(＜1000　mg/L)　and　LCFA　concentrations　(＜100　mg/L)　as　compared　with　the　thermophilic　CSTR.　Unlike　the　mesophilic　CSTR,　there　was　no　foaming　that　occurred　in　the　CSFBR　during　the　whole　experimental　period.　The　results　all　suggested　that　CSFBR　simultaneously　provided　high　treatment　capacity　and　process　stability　in　anaerobic　digestion　with　high-lipid　loading.　©　2022　by　the　authors.