Foldable seat for subway

The utility model relates to a foldable seat for a subway. The foldable seat for the subway comprises a base, a sliding sleeve and a seat body, and the seat body is connected with the sliding sleeve through a foldable device; the foldable device is hinged to the base and the sliding sleeve. A reset device is fixedly connected between the base and the sliding sleeve so as to drive the sliding sleeve to move upwards. An elastic piece used for being fixedly connected with the subway handrail is arranged between the sliding sleeve and the base, a fixing hole matched with the elastic piece is formed in the sliding sleeve, and the sliding sleeve slides downwards to enable the elastic piece to be clamped into the fixing hole so as to fix the sliding sleeve. According to the foldable seat for the metro, the reset spring is arranged between the sliding sleeve and the base, the reset spring is arranged on the metro handrail in a sleeving mode, when the seat needs to retract, after an elastic button is pressed down, the