The invention discloses a protective closed partition door for a living threshold in a subway section, comprising a sealed door, a left sealing strip, a right sealing strip, a hinge, a lock, an electric control cabinet, a telescopic column, a bayonet socket, an accommodation groove, a retaining column, and a living threshold , sill body, buried box, wiring hole, transfer box and door frame. The beneficial effects of the present invention are: the electrical control cabinet is electrically connected to the lock, the hinge, the left sealing strip, the right sealing strip and the living threshold, the overall device is convenient to be controlled uniformly, and the control accuracy is increased; the left sealing strip and the right sealing strip The strips are distributed in relative positions. After the overall door is closed, the structure is more stable and the fit is tighter; the left and right sealing strips are fixedly connected to the door frame, and the two sealing strips can have a stronger fixed sealing effect. And the connection is more stable; the telescopic column and the blocking column are electrically connected and locked through the electrical control cabinet, and the overall door is more stable after closing, and there will be no loosening.