The invention discloses a plastic cement rough edge repairing machine, especially belongs to the field of rough edge repairing of plastic cement handicrafts. The plastic cement rough edge repairing machine comprises a lateral shifting shaft, a longitudinal shifting shaft, a vertical shifting shaft, a rotating work platform and a rotating cutting tool. According to the plastic cement rough edge repairing machine, driven by a control circuit, a stepping motor or a servo motor rotates based on a pre-set program, the rotating cutting tool is driven by the lateral shifting shaft, the longitudinal shifting shaft and the vertical shifting shaft to rotate along a pre-set path, so that rough edges at surface joints of plastic parts are cut by the blade of the rotating cutting tool. The rotating work platform reciprocates 180 DEG, so that the positions of two sucking moulds arranged on the work platform are exchanged by turns, one of the sucking moulds is used for cutting, and the other sucking mould is used for sucking a plastic part to be repaired. The plastic cement rough edge repairing machine can be used for repairing plastic pats instead of artificial operation, lack of cutting or over cutting is avoided, labor intensity is reduced, rate of finished products and working efficiency are increased.