On-line portable combined self-propelled composite laser steel rail surface strengthening device

The utility model provides an online portable combined self-propelled composite laser steel rail surface strengthening device. The online portable combined self-propelled composite laser steel rail surface strengthening device comprises a rail car, a polishing and grinding assembly, a purging assembly, a continuous laser assembly and a pulse laser assembly. The rail car is suitable for running on the steel rails, and the running direction of the rail car serves as the front side. The polishing and grinding assembly is connected with the rail car and used for polishing and grinding the surface of the steel rail. The purging assembly is arranged on the rear side of the polishing and grinding assembly, connected with the rail car and used for purging the surface of the steel rail. The continuous laser assembly is arranged on the rear side of the purging assembly, is connected with the rail car, and is suitable for emitting continuous laser for quenching the surface of the steel rail; the pulse laser assembly is