Sliding door bottom sealing device

The invention discloses a sliding door bottom sealing device which comprises a profile support fixedly arranged at the bottom of a sliding door, a sealing part which is arranged in the profile support, and the sealing element slides between an opening position and a sealing position in the gravity direction, a lever which comprises a rotating shaft, a force applying rod and a control rod, the force applying rod and the control rod are fixedly arranged on the two sides of the rotating shaft respectively, the rotating shaft is rotationally arranged on the profile support, and the end, opposite to the rotating shaft, of the control rod is fixedly connected with a sealing part, and a spring which is used for suspending the sealing part at an opening position in a normal state, and a limiter which is fixedly arranged on the ground of the moving path of the sliding door and corresponds to the force applying rod in position. When the sliding door is opened, the limiter does not make contact with the stress applicati