Diamond drill bit repairing device

The utility model discloses a diamond drill bit repairing device. A composite material repairing layer of which the components are similar to those of a blank body of a drill bit and the granularity and concentration are consistent with those of a diamond demanded by the design is scattered on an abnormal-abrasion portion of the drill bit, and the composite material repairing layer is fixed to the blank body of the drill bit through a hot press method or an artificial resin adhesive method or an electric plating method to recover the work performance of the drill bit. The diamond drill bit repairing device can save a lot of diamonds and blank body materials, the service life of the repaired drill bit is similar to that of a new drill bit, the technical standards of drilling of the drill bit can be improved, the drilling cost is lowered, and the application aspects are quite broad.