The　design　and　construction　of　gradient　pore　structures　are　effective　in　the　preparation　of　high-performance　ceramic　membranes.　In　this　study,　ceramic　microfiltration　membranes　with　tertiary　gradient　structures　were　obtained　by　combining　3D　printing　with　dip-coating　technology　based　on　a　UV-curable　alumina　suspension.　Millimeter-scale　pyramid-type　microporous　structures　formed　by　coarse-particle　stacking　were　used　in　the　support,　while　submicron　pore　structures　formed　by　the　accumulation　of　fine　particles　were　employed　in　the　membrane　layer.　The　optimized　ceramic　support　had　an　effective　pore　size　of　1.02　mu　m　and　pure　water　permeance　of　1850　L.m-　2　h-1.bar-　1.　After　the　deposition　of　the　membrane　layer,　the　effective　pore　size　was　significantly　reduced　to　109　nm,　while　the　pure　water　permeance　remained　as　high　as　1050　L.m-　2　h-1.bar-　1.　Additionally,　ceramic　microfiltration　membranes　exhibited　good　performance　in　the　separation　of　nanoparticles　from　water　suspensions.