The utility model discloses a be suitable for elasticity slotted damping fastener of subway vehicle depot storehouse interior lines, including rail, sleeper, board lower bolster, base iron tie plate,vibration isolator, float iron tie plate and rail lower bolster, the boss has in the middle part of the base iron tie plate both sides, float iron tie plate both sides middle parts have with the spoutof boss looks adaptation, the iron tie plate that floats locates base iron tie plate's boss through its sliding groove on, just nested flexible wear -resisting cover between boss and spout, wear -resisting cover of elasticity and boss fixed connection, be nature in close contact with between wear -resisting cover of elasticity and spout, iron tie plate had formed elasticity slotted cooperation relation between the two about wherein the combination between wear -resisting set of three of boss, spout and elasticity made, this kind of cooperation relation make the train through the time float iron tie plate only allow about the vibration, and vertically displacement, lateral displacement and upset displacement all by the close check a very little scope, can fully ensure driving safety and fastener structures security.