The　structural　stability　of　the　ceramic　nanoparticle　(NP)　is　essential　for　its　versatile　applications　in　broad　fields.　Due　to　inevitable　imperfections　on　the　surfaces,　the　NP　usually　yields　at　a　stress　that　is　far　below　its　theoretical　strength.　Here　we　propose　an　effective　way　to　approach　the　theoretical　strength　of　the　NPs　by　simply　homogenizing　the　primary　imperfections.　Electron　beam　irradiation　is　utilized　to　modify　the　original　uneven　surface　and　achieve　surface　nano-crystallization　in　MgO　NPs,　which　leads　to　more　homogeneous　stress　distribution　intrinsically　as　proved　by　numerical　simulations.　As　a　result,　quasi-homogeneous　surface　nucleation　of　dislocations　occurs　and　raises　the　compressive　strength　to　be　three　times　higher　than　the　as-received　particles　with　the　original　surface.　The　near-theoretical　strength　gained　here　indicates　that　the　imperfection　in　materials　can　be　homogenized　to　optimize　the　properties　to　approach　that　of　perfect　crystals.