The invention discloses a pin tumbler moving piece for a pin tumbler lock cylinder assembly machine, and relates to the technical field of lock cylinder machining. The pin tumbler moving piece comprises a rack; the rack is provided with a first moving plate for transporting pin tumblers, a second moving plate for transporting springs, and a third moving plate for transporting plugs; the first moving plate is located below the second moving plate; the second moving plate is located below the third moving plate; the first moving plate is connected with a driving piece; the driving piece drives the first moving plate to slide relative to the rack; the first moving plate is provided with a first limiting bulge and a second limiting bulge which drive the second moving plate to slide; the firstmoving plate drives the second moving plate to slide relative to the rack; the second moving plate is provided with a third limiting bulge and a fourth limiting bulge which drive the third moving plate to slide; and the second moving plate drives the third moving plate to slide relative to the rack. The efficiency of the feeding process can be improved, and a structure of the pin tumbler moving piece is more compact.