Purifying power supply taking railway electric power supply and traction energy recovery into consideration

The invention relates to a purifying power supply taking railway electric power supply and traction energy recovery into consideration. A main circuit of the purification power supply comprises a railway electric power supply module M1, a traction energy bidirectional control module M2 and an energy release module M3; the railway electric power supply module M1 converts a traction voltage into 10kV voltage suitable for railway electric power supply; the traction energy bidirectional control module M2 recovers braking energy and simultaneously releases stored energy to a traction side and a power unit; the energy release module M3 releases the stored energy to a railway power side. According to the purifying power supply, the functions of supplying power to railway electric power by railwaytraction with each module can be achieved, thereby recovering and releasing the braking energy at the traction side, and releasing the braking energy to the railway electric power; the whole scheme enriches the functions of