The invention discloses a patrol robot recognizable fence which comprises four stand columns, and rotating pipes are rotationally mounted on the opposite sides of a pair of adjacent stand columns from top to bottom. Animals wanting to enter the fence can be blocked through a first transverse rod and a second transverse rod which can rotate, so that the animals slide down; and when the animal wants to enter the fence, the rotation of a first cross rod and a second cross rod is utilized to cooperate with a piston assembly, a liquid supply assembly, a first pipe body and a valve body, so that the movement path of the animal outside the fence can be disinfected, the animal can be further warned, the animal is prevented from entering the fence, and the safety of the animal is improved. Meanwhile, the rod body can generate vibration to generate knocking sound, so that animals can be frightened, the protection effect is further improved, meanwhile, the robot can recognize the fence, the robot can be prevented from colliding with the fence to stop patrolling, and the device is worthy of application and popularization.