The invention discloses a precision cutting device for a CFG pile head. The precision cutting device for CFG pile head comprises a rack; a horizontal control panel frame which can lift up and down issuspended in the rack; the left side and the right side of the horizontal control panel frame are respectively connected with cutting mechanisms which can move back and forth left and right in a rolling mode; the cutting mechanisms comprise motor supports connected with the horizontal control panel frame through idler wheels in a rolling mode, driving motors arranged on the motor supports, and cutting knife flywheels connected with the driving motors in a transmission mode; by adjusting the horizontal control panel frame, the cutting knife flywheels at the left and right sides are in the samehorizontal axis as the CFG pile, the cutting knife flywheels at two sides are successively driven to cut the CFG pile respectively, because the positions of the two cutting knife flywheels are adjusted through the horizontal control panel frame, the cutting knife flywheels are avoided to appear more connected faces due to being deviated from the horizontal axis, the smoothness of pile top cuttingis ensured, and the phenomenon of inclined plane, wrong table or two layers of skin is easily overcome after cutting in the prior art.