The　urgency　for　cost-effective,　high-resolution,　flexible　X-ray　imaging　detectors　is　generating　great　demand　for　scintillators　with　low-temperature　processability,　high　scintillation　yield,　and　negligible　afterglow.　X-ray　imaging　materials　are　currently　dominated　by　inorganic　scintillators　in　the　form　of　rigid　films　and　bulk　crystals,　which　have　inherent　limitations　including　high-temperature,　complex　synthesis,　and　considerable　challenges　toward　advanced　nonplanar　imaging.　Here,　high-performance　and　flexible　X-ray　scintillators　based　on　novel　zero-dimensional　(0D)　(BTPP)2MnX4　(BTPP　=　benzyltriphenylphosphonium;　X　=　Cl,　Br)　halides　are　reported.　They　emit　bright　green　light　originating　from　the　4T1-6A1　transition　of　Mn2+　under　X-ray　excitation.　In　particular,　(BTPP)2MnBr4　single　crystals　exhibit　excellent　air-　and　radiation-stability,　a　high　scintillation　yield　of　53　000　photons　MeV-1,　a　low　detection　limit　of　89.9　nGyair　s-1,　and　an　ultralow　afterglow　comparable　to　commercial　Bi4Ge3O12　(BGO)　single　crystals.　Moreover,　the　(BTPP)2MnCl4@polydimethylsiloxane　(PDMS)　flexible　scintillation　screens　achieve　a　high　spatial　resolution　of　14.1　lp　mm-1　and　realize　high-quality　imaging　results　of　nonplanar　objects.　This　study　demonstrates　that　the　flexible　scintillation　screens　based　on　low-dimensional　Mn(II)　hybrid　halides　have　significant　potential　for　low-dose　and　high-resolution　X-ray　imaging　applications.　The　green-emitting　(BTPP)2MnX4　(X　=　Cl,　Br)　flexible　scintillation　screens　demonstrate　high　scintillation　yield,　decent　X-ray　detection　limit,　ultralow　afterglow,　high　radiation　resistance,　superior　imaging　spatial　resolution,　and　high-quality　imaging　results　for　both　planar　and　nonplanar　imaging　objects.　These　results　highlight　the　great　potential　of　developing　low-dimensional　Mn(II)　hybrid　halides　for　X-ray　detection　and　imaging　applications.image