Road-side unit synchronizer used for electronic charging system without parking

The utility model discloses a road-side unit synchronizer used for an electronic charging system without parking which comprises a microprocessor, a synchronizing signal generator connected with the microprocessor, a synchronizing signal transmitting port and a total connection-line interface. The synchronizing signal transmitting port and the total connection-line interface connect with the road-side unit device of adjacent driving ways located on same side or different side of the highway, the synchronizing signal generator transmits a synchronizing pulse signal or indication to the road-side unit device through the synchronizing signal transmitting port. The synchronizer overcomes interference problems of adjacent driving ways on same side or different side in the process of electronic automatic charging, detects or awakes the road-side unit corresponding to the electronic label from a plurality of road-side units with quickest speed, thereby reaching aim of closing transaction. The synchronizer has characteristics of rapid reaction, accurate judge, low cost, rapid effectiveness and convenient installing, etc.