Perovskite　materials　are　ideal　candidates　for　the　activity　layers　in　electrooptic　components　due　to　their　effective　light　absorption　and　high　carrier　mobility.　However,　perovskites　produced　through　traditional　solution　methods　often　suffer　from　poor　crystallinity　and　high　defect　density　and　are　susceptible　to　damage　under　high　temperature　and　light　exposure,　which　limits　device　performance.　In　this　work,　high-quality　1D　single-crystal　CsPbBr3　microwire　(MW)　arrays　are　successfully　synthesized　on　muscovite　substrates　using　chemical　vapor　deposition　(CVD)　by　optimizing　growth　parameters　such　as　growth　time,　temperature,　and　substrate　position.　The　photodetector　based　on　the　as-grown　MWs　exhibits　outstanding　photoelectric　performance,　achieving　a　light-to-dark　current　ratio　of　up　to　5.53　×　102　at　a　working　voltage　of　5　V　and　a　photoresponsivity　of　up　to　9.4　×　10-4　A　W-1　at　a　small　illumination　power　intensity　of　1　mW　cm-2.　Additionally,　this　photodetector　demonstrates　an　ultrarapid　photoresponse　time　with　a　fall　time　of　140　μs　and　a　rise　time　of　92　μs　under　a　365　nm　laser.　This　research　presents　a　facile　and　controllable　strategy　for　synthesizing　high-quality　1D　perovskites　with　ultrafast　photoresponse,　which　access　the　mean　for　developing　high-performing　1D　perovskite　photodetectors.　©　Published　under　licence　by　IOP　Publishing　Ltd.