A safety foothold of a subway train is provided to prevent a safety accident while getting on and off the train by putting the foothold between the platform and train before doors open. A safety foothold of a subway train comprises: an extrusion piece forming incline on the bottom of the train door; a cylinder(4) forming the guide groove(4a) on the outer side; a hinge unit(8) consisting of a hinge(11) having a reconstruction spring(12) and the foothold formed in three shifts; a drive lever(7) fused by joining the reconstruction spring on the bottom part.
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