The invention relates to a full-tooth automatic toothbrush. The full-tooth automatic toothbrush comprises a driving motor, a power supply, a control device and a brush head; the brush head is arc-shaped and can be contained in an oral cavity; semi-surrounded brush surfaces are arranged up and down along the shape of the brush head; and each brush surface is provided with an inner-tooth brush surface, an outer-tooth brush surface, an occlusion brush surface and a hair-planting beam. The electric toothbrush can clean maxillary teeth and mandibular teeth simultaneously, and the driving motor is positioned on the inner side of the brush head. The invention provides the electric toothbrush which is higher in efficiency and convenient to operate, accords with the physiological structure of a human body and can correct bad tooth-brushing action to avoid tooth injury; and through setting of the motor position, the kinetic energy of the motor can be effectively transmitted, the brush head adheres to the teeth well, and cleaning dead corners are avoided. In the use process of the full-tooth automatic toothbrush, double hands can be liberated.