The invention relates to the field of rubber production, and particularly to a full-automatic rubber cutter. The full-automatic rubber cutter comprises the components of a fixing device which is used for fixing the device on a rubber tree, a cutting device (2) which is used for cutting bark of the rubber tree, a horizontal walking device (3) which is used for controlling position of the cutting device in a horizontal surface direction, and a vertical walking device (4) which is used for controlling position of the cutting device in a vertical direction. The cutting device (2) is mounted on the horizontal walking device (3). The horizontal walking device (3) is mounted on the vertical walking device (4). The vertical walking device (4) is mounted on the fixing device (1). After a user fixes the rubber cutter on the trunk of the rubber tree by means of the fixing device, timely cutting to the bark of the rubber tree can be finished, thereby realizing automatic rubber harvesting.