The invention relates to the technical field of speed changer planetary gear needle arranging, in particular to an automatic speed changer planetary gear needle arranging system. The automatic speed changer planetary gear needle arranging system comprises a rotating tray, the lower end of the rotating tray is provided with a driving motor, the outer ends of a gear feeding station and a pad piece feeding station are provided with a planetary gear feeding device and a pad piece feeding device correspondingly, the outer ends of a first needle arranging station and a second needle arranging station are provided with planetary needle arranging racks correspondingly, the outer ends of a first detection station, a second detection station and a third detection station are provided with a first industrial camera, a second industrial camera and a third industrial camera correspondingly, and the first industrial camera, the second industrial camera and the third industrial camera are in electricconnection with the driving motor correspondingly. According to the automatic speed changer planetary gear needle arranging system and a working method for the automatic speed changer planetary gearneedle arranging system, by means of the manner that a main body frame is internally provided with a middle hood, the main body frame is divided into a clothes, hat and related apparatus placing areaand a footgear placing area, meanwhile, the middle hood is internally provided with an air drying device, and air-drying is performed on fire-fighting suits with a certain moisture content.