A rocker button switch device of a dog leash includes: an outer shell, a line wheel, a button, a locking slider, an unlocking slider, and a translation slider, wherein the button is mounted in a corresponding groove on the outer shell, the button is a rocker button, and able to rotate about a rocker central axle, two ends of the button respectively contact the locking slider and the unlocking slider directly and slidingly, for driving the locking slider and the unlocking slider to move up and down, the translation slider includes a translation spring, the translation slider and the unlocking slider push each other by inclined plane sliding, and the translation slider and the locking slider are locked together via a buckle. The rocker button switch device of the dog leash is simple in movement, convenient to use, and stable in performance.
