The utility model discloses an interval sealing partition door escape canal device of subway, including water pipe and door frame, one side of door frame is connected with the water pipe, the oppositeside of door frame is connected with and loads and unloads protective cover plate, and its: can dismantle the opposite side sealing connection that protective cover plate passes through blocking device and door frame, can dismantle and install the sealing strip between protective cover plate and the door frame. Blocking device is including installing the lock ear in the door frame both sides, andcan dismantle protective cover plate and rotates the spring bolt of being connected, the spring bolt can load and unload protective cover plate and door frame sealing connection through locking the order of supra -auricular lockhole. The utility model has the characteristics of simple manufacture, the operability is good, and is reliable and stable.