The invention discloses a pet tractor which comprises a housing on which a handle is formed, a rotary plate rotationally arranged in the housing, and a traction rope wound on the rotary plate, wherein a rope outlet for the leading-out of the traction rope is formed in the housing, a button exposed out of the housing is arranged at the handle, a clamping block linked and matched with the button is mounted in the housing, a return spring is arranged between the clamping block and the housing, and a plurality of clamping teeth matched with the clamping block are formed on the rotary plate; in a natural state, the clamping block is separated from the clamping teeth under the action of elastic force of the return spring, and the rotary plate can freely rotate; after the button is pressed, the clamping block generates a linked action and is clamped with the clamping teeth, and the rotary plate is circumferentially locked. According to the pet tractor, a user can quickly pull and hold a pet running away by only slightly pressing the button on the tractor, so that the pet is limited within a certain controllable adjustable rang and the accident is avoided; meanwhile, when the user needs to lock the state, the state can be locked by only moving a push button built in the button, and on the contrary, the state can be unlocked.