The invention provides a computer-controlled surface polishing and grinding machine for a ceramic tile. The machine is characterized in that a grinding wheel motor supporting rod is fixed to a bottomframe, wherein a grinding wheel is mounted on a grinding wheel shaft of the grinding wheel motor; a ceramic tile cushion board is arranged at the lower part of the grinding wheel; a ceramic tile baffle plate is fixed to one side of the grinding wheel; pulleys are mounted at the lower part of the ceramic tile cushion board through pulley yokes; the pulleys are positioned on a slide rail of a sliderail plate; a ceramic tile cushion board push-pull device is arranged at one side of the ceramic tile cushion board; a lifting rod plate is arranged at the lower part of the slide rail plate; a rack which is equipped with a lifting motor is arranged on a lifting driving rod; a push-pull screw and a tooth-shaped screw tube are arranged on the ceramic tile cushion board push-pull device; a push-pullmotor gear is mounted on a push-pull motor; a computer controller is mounted on the grinding wheel motor supporting rod. With the adoption of the machine, the surface of a ceramic tile body under a computer control condition; the smooth finish, the thickness and the pushing speed can be adjusted. Therefore, the ceramic tile body polishing and grinding efficiency and quality can be improved, and glazing can be easily carried out; the machine is suitably used as a mechanism for polishing and grinding the surface of the ceramic tile based on computer control.