A pet traction device includes a housing, a reel, a switch button and a brake paddle. A reel frame is mounted into the housing; the reel is rotatably installed into the reel frame; a brake position is defined at a position with a spacing from the reel and corresponding to a free end of the brake paddle; the brake paddle is pivoted to the housing through a pin shaft; a torsion spring is sheathed on a pin shaft; the torsion spring has a section fixed to a protrusion of the reel frame and the other end abutting an inner wall of the brake paddle; the brake portion corresponds to an arc bottom of the switch button; and the switch button has a movable latching portion corresponding to a fixed latching portion disposed in the housing and proximate to the rear of the switch button.
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