一种车辆的档位锁定机构，其车辆具有排档杆单元及变速箱，变速箱设有档位感知器，车辆的档位锁定机构包含有驱动单元及摇臂，驱动单元接收档位感知器所感知的目标档位信号后，驱动单元带动摇臂自动地锁住排档杆单元，以令该排档杆单元的排档杆无法被手动换档，因其排档杆单元系由增设摇臂来达成禁止手动直接变换档位，不需要变更排档杆单元或变速箱内部的结构设计。

A lockout mechanism for a vehicle gear is presented. The vehicle has a gearshift lever unit and a gearbox. The gearbox is installed with a gear sensor. The vehicle gear lockout mechanism comprises a drive unit and a rocker arm. After the drive unit receives destination gear signals perceived by the gear sensor, the drive unit drives the rocker arm to automatically lock the gearshift lever unit, to let the gearshift lever of the gearshift lever unit be unable to change gear manually. Due to the gearshift lever unit by use of installing a rocker arm to prohibit direct changing gear manually, changing the structure design of the gearshift lever unit or the interior gearbox design is not needed.