Core sample grinding machine capable of automatically overturning core sample

The utility model discloses a core sample grinding machine capable of automatically turning over a core sample, which comprises a grinding machine body, a fixed table is fixedly arranged on a base of the grinding machine body, a rotating plate is rotatably connected to the side wall of the fixed table, a first clamping plate is fixedly arranged on the end face, back to the fixed table, of the rotating plate, a second clamping plate abuts against the side wall of the first clamping plate, and a fixing bolt penetrates through the second clamping plate. The fixing bolt is in threaded connection with the first clamping plate, the opposite side walls of the first clamping plate and the second clamping plate are provided with core sample grooves which are communicated with each other and in which the core samples abut, and the core samples abut against the inner walls of the core sample grooves; and a fixing assembly for fixing the position of the rotating plate is arranged between the rotating plate and the fixing