The invention discloses a cutter grinding machine comprises a support. Grinding wheels are arranged on the support through a driving shaft, and the driving shaft is connected with a driving device. The cutter grinding machine is characterized in that the support is provided with a grinding wheel truing device, and the grinding wheel truing device is arranged above the grinding wheels. Because theworn grinding wheels can be trued frequently at any time by the grinding wheel truing device, the cutter grinding efficiency and the service lives of the grinding wheels can be obviously improved andprolonged, and accordingly the cutter grinding efficiency and the service lives of the cutter grinding machine which uses the grinding wheels rather than steel wheels can be also obviously improved and prolonged. Moreover, the trued grinding wheels have smooth surface and obviously improved cutter grinding precision.