The application discloses a passenger isolation line automatic lifting device, which comprises two stands, the bottom end of the stand is arranged in a groove on the ground, and the side wall of the stand is provided with a rack rail; a sleeve ring is sleeved on the stand, the sleeve ring can move up and down along the setting direction of the stand; the sleeve rings on the two stands are connected with an isolation line, a rotating gear is arranged in the mounting hole in the side wall of the sleeve ring, the rotating gear is in transmission connection with the output end of a side motor, the motor is fixed to the outer side wall of the sleeve ring through a fixing block, the rotating gear is in mesh with the rack rail, and the two grooves are connected and communicated through a long hole; the sleeve ring is driven by the motor to drive the isolation line to automatically lift, compared with manually arranging the isolation line, the setting efficiency of the isolation line is improved, in addition, the sleeve ring is driven by the motor to move along the setting direction of the stand to realize automatic lifting control of the isolation line, and the response speed of the isolation line arrangement is improved.