The invention discloses a rear-drive transmission reverse-gear structure which is simple in structure. The rear-drive transmission reverse-gear structure further comprises a wear reduction gasket and a spacer bush, the left end of a reverse-gear shaft is fixedly connected with a middle connection plate without rotation, the overall shaft extends rightwards in the axial direction, and the slightly rightwards position of the middle of the shaft is provided with a limiting portion and an assembling portion, wherein the limiting portion extends outwards in the radial direction, the assembling portion extends rightwards from the limiting portion in the radial direction, and the right end of the assembling portion is connected with a middle connection portion in a transmission box body. A left reverse-gear gear needle bearing, the spacer bush, a right reverse-gear gear needle bearing and the wear reduction gasket are assembled to the assembling portion of the reverse-gear shaft and located between the limiting portion of the reverse-gear shaft and the middle connection portion in the box body, the wear reduction gasket and a bearing pressing plate are correspondingly matched, and a reverse-gear idler gear is mounted on the left reverse-gear gear needle bearing and the right reverse-gear gear needle bearing and located between the limiting portion of the reverse-gear shaft and the wear reduction gasket.