The invention discloses a quick running device and belongs to the field of sports equipment. The quick running device comprises an infrared sensing device, a belt, a battery device, two propellers, a control module, rigid connecting lines and two motors; a battery is located on the rear side of the belt; the motors are the left motor and the right motor; the propellers are the left propeller and the right propeller which are connected with the left motor and the right motor through two rigid connecting shafts correspondingly; the rotation directions of the left propeller and the right propeller are opposite; the infrared sensing device is mounted on the inner side of a thigh of a user and is in wireless connection with the control module to sense the frequency of thigh moving; and the control module controls starting and stopping of the motors and controls acceleration or deceleration of the motors according to the frequency sensed by the infrared sensing device. The quick running device is fixed to a waist of a human body through the belt; after the user starts the quick running device, the motors drive the propellers to rotate to produce lift force, and the user runs faster; and the quick running device is simple in structure and can produce the lift force to enable the user to feel the partial weightlessness state.