As　one　of　the　fastest　growing　detectors　in　recent　years,　infrared　detectors　are　widely　used　in　military　and　civil　use,and　play　an　irreplaceable　role.By　analysing　and　generalizing　some　of　the　relevant　english　literature　of　recent　years,　This　article　describes　the　development　of　a　variety　of　new　infrared　detectors　domestic　and　abroad,　including　Pb-salt　array　detector　double-color/multicolor　MCT　(HgCdTe)　detector　MCT　array　detector　planar　linear　array　InGaAs　detector　and　so　on.　Self-cooled　dark　current　correction　of　Pb-salt　detectors;The　developments　of　third　generation　MCT　devices　in　array　size　double-color/multicolor　very　long　wavelength　application　of　photovoltaic　tech-nology　amplifier　capability　;　The　current-voltage　measurement　of　eight　element　planar　linear　array　InGaAs　detector　the　difference　between　a　peak　response　rate　obtained　through　the　signal　noise,and　the　corresponding　spectra　and　the　theoretical　values　and　etc　were　analyzed.　According　to　the　current　development　state　of　infrared　detector,we　analyze　application　prospect　in　railway　infrared　hotbox　detection　system.These　new　infrared　detectors　will　be　developed　and　improved　in　the　next　3-5years,and　then　the　level　of　production　can　be　achieved.　©　2011　IEEE.