Organic-inorganic　metal　halide　hybrids　show　great　potential　for　applications　in　catalysis,　solar　cells,　gas　sensing,　etc.　Due　to　the　highly　designable　structure,　a　novel　strategy　could　be　developed　to　improve　their　gas　sensitivity　in　gas　detection.　Two　new　organic-inorganic　metal　halide　hybrids　have　been　synthesized　using　[(Et)2MP]+　(MP　=　p-mercaptopyridine,　Et　=　ethyl)　as　the　cationic　template.　The　1-dimensional　inorganic　chain　provides　good　electron　transport　channels,　and　the　electronic　structure　can　be　easily　adjusted　by　changing　the　halogen　to　enhance　the　sensitivity　of　gas　sensing.　The　difference　in　response　values　for　NO2　can　reach　27　times　before　and　after　the　halogen　change.　This　work　provides　insight　into　the　design　of　gas-sensing　materials　with　improved　properties.