Metal　halide　perovskites,　as　a　new　class　of　attractive　and　potential　scintillators,　are　highly　promising　in　X-ray　imaging.　However,　their　application　is　limited　by　the　sensitivity　to　moisture　and　irradiation.　To　address　this　issue,　we　reported　a　2D　layered　double　perovskite　material　Cs4Cd1-xMnxBi2Cl12　that　exhibits　high　stability　both　under　ambient　condition　and　under　X-ray　irradiation.　Cs4Cd1-xMnxBi2Cl12　demonstrates　superior　scintillation　performance,　including　excellent　X-ray　response　linearity　and　a　high　light　yield　(similar　to　34,450　photons/MeV).　More　importantly,　the　X-ray　excited　emission　intensity　maintains　92%　and　94%　of　its　original　value　after　stored　at　ambient　condition　for　over　two　years　and　after　X-ray　irradiation　with　a　total　dose　of　11.4　Gy,　respectively.　By　mixing　with　PDMS　(polydimethylsiloxane),　we　have　successfully　produced　a　high-quality　flexible　film　that　can　be　bent　freely　while　maintaining　its　excellent　scintillation　properties.　The　scintillating　screen　exhibits　outstanding　imaging　ability　with　a　spatial　resolution　of　up　to　16.7　line　pairs　per　millimeter　(lp/mm),　also,　the　superiority　of　this　scintillation　screen　in　flexible　X-ray　imaging　is　demonstrated.　These　results　indicate　the　huge　potential　of　this　high-stability　double　perovskite　scintillator　in　X-ray　imaging.