A novel dog leash includes a case with a receiving space, a reel, a switch button, a transmission member, and a braking paddle, with an axle core positioned therein and sheathed in the reel; spaced braking positions configured on the reel, corresponding to the braking paddle; the braking paddle pivoted in the case, including a first pivoted end and a first free end; the transmission member pivoted in the case, including a second pivoted end and a second free end; the second free end and the first pivoted end positioned on two opposite ends of a first spring, while the second pivoted end and the first free end on that of the second spring. The second pivoted end cooperates with the switch button extending to the outside of the case. With this structure, the rotation suspending or locking of reel may be achieved, with a high braking reliability.
