Automobile reverse-gear mechanism

The utility model discloses an automobile reverse-gear mechanism which comprises an input shaft, an output shaft, reverse-gear gear wheels and a synchronizer. The synchronizer is fixedly sleeved on the output shaft, the input shaft is a gear wheel shaft, and the reverse-gear gear wheels are sleeved on a reverse-gear gear wheel shaft. The automobile reverse-gear mechanism is characterized in that the reverse-gear gear wheels include a first reverse-gear gear wheel and a second reverse-gear gear wheel, wherein the first reverse-gear gear wheel and the second reverse-gear gear wheel are sleeved on the reverse-gear gear wheel shaft through spline sleeves, the first reverse-gear gear wheel is meshed with the input shaft, and the second reverse-gear gear wheel is meshed with the synchronizer during reverse-gear shifting. The automobile reverse-gear mechanism uses two reverse-gear gear wheels to share impact force produced in reverse-gear shifting, prolongs the service life of the reverse-gear gear wheels, reduces noise and further has the advantages of being simple in structure, low in maintenance rate and the like.