The utility model discloses a can discern train license number device that line position tracked of going forward side by side, center collection system and computer lab control monitoring device internet access, computer lab monitoring device and license number automatic identification equipment communication connection, license number automatic identification equipment, all be connected with the dual supply on center collection system and the computer lab monitoring device, all install wheel detector with train total inlet port throat department on each strand track of train, license number automatic identification equipment is also installed in total inlet port throat department simultaneously, be connected with total server on the computer lab monitoring device, install wheel detector and central collection system communication connection on each strand track of train, install wheel detector and license number identification equipment communication connection in total inlet port throat department, it has the work efficiency height, and the management is convenient, and the wheel detector who has the source magnet steel realizes that the wheel zero velocity detects, effectual wrong of the wrong axle of avoiding, and the real -time detects the function, accurately and timely masters vehicle information and position.