Perovskite　materials　are　promising　candidates　for　the　implementation　of　electrically　pumped　lasers　considering　the　enhanced　performance　of　perovskite-based　light-emitting　diodes.　Nonetheless,　current　methods　of　fabricating　perovskite　optical　microcavities　require　complex　patterning　technologies　to　build　suitable　resonant　cavities　for　perovskite　laser　emission,　burdening　the　device　structure　design.　To　address　this　issue,　we　applied　inkjet　printing,　a　maskless　patterning　technique,　to　directly　create　spontaneous　formations　of　polycrystalline　perovskite　microcavity　arrays　to　explore　their　laser-emitting　action.　The　substrate　surface　tension　was　tuned　to　modulate　the　perovskite　crystallization　process　in　combination　with　optimization　of　printing　ink　recipes.　As　a　result,　polycrystalline　perovskite　microcavity　arrays　were　achieved,　contributing　to　the　laser　emission　at　528　nm　with　a　lasing　threshold　of　1.37　mJ/cm(2),　while　simultaneously　achieving　high-definition　patterning　of　flexible　display.　These　results　clearly　illustrate　the　efficiency　of　inkjet　printing　technology　in　the　preparation　of　polycrystalline　perovskite　optical　microcavities　and　promote　the　development　of　flexible　laser　arrayed　displays,　providing　a　facile　process　toward　the　realization　of　perovskite-cavity　laser　devices.