The invention provides a road multifee lane system and an implementing method. According to the road multifee lane system, under the condition that a lane is not added, multiple vehicles can be processed at the same time by prolonging a charging lane and adding a plurality of devices. After a multifee lane is used, two or more vehicles can enter into the multifee lane at a time and at the same time, charging operation can be performed at the same time. Two or more vehicles can be processed within a charging period so that traffic capacity is effectively improved and jams are relieved. Based on original lanes of a toll station, the lanes are backwards lengthened, corresponding charging units are added and a charging procedure method is improved. Under the condition that no lanes or weighing platforms are added, truck multifee-by-weight and passenger car multifee are achieved, land is saved and investment cost is reduced.