The invention discloses a method for repairing a white defect by way of laser vapor deposition. The method comprises the following steps: arranging a repair starting point at a corner close to the white defect; arranging a repair finishing point at an opposite angle of the repair starting point close to the white defect, wherein a region encircled by a straight line which transversely extends from the repair starting point, a straight line which longitudinally extends from the repair starting point, a straight line which transversely extends from the repair finishing point and a straight line which longitudinally extends from the repair finishing point on the plane of the white defect is a scanning and repairing region, and the white defect is fully positioned in the scanning and repairing region; and scanning and repairing from the repair starting point to the repairing finishing point in the scanning and repairing region by way of laser vapor deposition, wherein the surface of the white defect is fully covered by a repair film to achieve repair. The method for repairing the white defect by way of laser vapor deposition provided by the embodiment of the invention can be used for repairing large-sized white defects by way of scanning and repairing.