Portable　X-ray　imaging　technology　plays　a　crucial　role　in　enabling　prompt　diagnosis　and　treatment　outdoors.　Nevertheless,　the　persistent　challenge　of　external　optical　signal　crosstalk　poses　a　significant　bottleneck　to　its　advancement.　Herein,　a　solution　utilizing　near-infrared　(NIR)　light　to　effectively　mitigate　optical　crosstalk　is　proposed,　thereby　demonstrating　the　feasibility　of　portable　X-ray　imaging　even　under　ambient　light.　A　series　of　rare　earth　ions　doped　Cs2AgxNa1-xInyBi1-yCl6　halide　scintillators　is　reported,　which　possess　bright　broadband　visible　and　NIR　emissions.　Taking　Cs2Ag0.6Na0.4In0.95Bi0.05Cl6:　5%Tm　as　an　example,　it　shows　decent　thermal　quenching　resistance,　high　PLQY　up　to　76.3%,　and　compelling　light　yield　up　to　33500　photons　MeV-1.　The　highly　efficient　NIR　emission　is　attributed　to　the　energy　transfer　from　the　optimized　host　to　lanthanide　ions.　A　flexible　scintillation　film　is　prepared　by　mixing　poly(dimethyl-siloxane)　with　Cs2Ag0.6Na0.4In0.95Bi0.05Cl6:　5%Tm　powder,　realizing　a　low　X-ray　detection　limit　of　55.2　nGyair/s　and　a　high　spatial　resolution　of　11.2　lp　mm-1.　Due　to　the　efficient　NIR　emission,　the　scintillation　film　enables　clear　X-ray　imaging　under　bright　LED　illumination　with　the　simple　addition　of　filters,　avoiding　the　necessity　of　a　complex　imaging　apparatus.　This　work　sheds　light　on　NIR　emissive　scintillator　for　rapid　outdoor　response　and　portable　X-ray　imaging.　A　series　of　Cs2AgxNa1-xInyBi1-yCl6:　rare　earth　(RE:　Yb,　Nd,　Er,　Tm)　single　crystals　are　successfully　synthesized.　As　a　highly　efficient　scintillator,　the　optimized　Cs2Ag0.6Na0.4In0.95Bi0.05Cl6:　5%Tm　with　high　light　yield　shows　excellent　near-infrared　emission,　acceptable　thermal　quenching　resistance,　and　good　spatial　resolution.　The　portable　X-ray　imaging　of　Cs2Ag0.6Na0.4In0.95Bi0.05Cl6:　5%Tm@PDMS　is　also　demonstrated.　image