The　purpose　of　this　study　is　to　use　aeolian　sand　obtained　from　Inner　Mongolia　to　partially　replace　quartz　sand　as　fine　aggregate　to　prepare　3D　printed　mortar　to　solve　the　scarcity　problems　of　quartz　sand　resources　in　northwestern　China.　The　mechanical　properties　tests　(including　flexural　strength,　compressive　strength,　tensile　bond　strength　and　axial　compression　tests)　and　frost　resistance　tests　of　cast　specimens　and　printed　mortar　specimens　in　the　X,　Y　and　Z　directions　(abbreviated　as　CS,　PS-X,　PS-Y　and　PS-Z)　were　investigated.　Furthermore,　their　microscopic　morphology　and　pore　structure　parameters　were　compared　and　analyzed　using　scanning　electron　microscopy　(SEM)　and　low　field　nuclear　magnetic　resonance　(NMR),　respectively.　The　results　showed　that　the　flexural　strength　and　compressive　strength　of　the　samples　following　the　inclined　cross-path　were　superior　to　those　following　the　Z-shaped　path　specimens.　The　tensile　bonding　strength　of　the　CS,　PS-X,　PS-Y　and　PS-Z　exhibited　that　F-3　＞　F-3X　＞　F-3Z　＞　F-3Y,　and　the　peak　stress　was　observed　as　F-4X　＞　F-4　＞　F-4Z　＞　F-4Y.　This　was　attributed　to　the　cement　hydration　of　CS　and　PS-X　being　more　sufficient　than　those　of　PS-Y　and　PS-Z.　Furthermore,　freezing-thawing　cycles　accelerated　the　degradation　of　aeolian　sand　3D　printed　mortar　specimens,　increased　their　weight　loss　rate　and　porosities,　as　well　as　reduced　relative　dynamic　modulus　of　elasticity.　The　porosities　of　specimens　were　as　follows:　PS-Y　＞　PS-Z　＞　PS-X　＞　CS,　and　the　porosity　of　PS-Y　was　97.62　%,　36.07　%　and　10.67　%　higher　than　those　of　CS,　PS-X　and　PS-Z,　respectively.　The　significance　of　this　research　is　to　provide　technical　guidance　and　basis　for　the　application　of　aeolian　sand　in　3D　printed　mortar　in　the　future.