Horizontal fluid polishing machine capable of rotating inside and outside

The utility model discloses an internal and external double-rotation horizontal fluid polishing machine which comprises a machine frame, two mandrels are arranged on the machine frame, the two mandrels are in transmission connection with a first driving device, and a material barrel is arranged between the two mandrels. A driving shaft is arranged in each core shaft, the two driving shafts are respectively in transmission connection with a second driving device, and a plurality of clamps are arranged on each driving shaft. According to the utility model, the charging barrel is driven by the two mandrels, the driving shafts are respectively arranged in the two mandrels, and the mandrels and the driving shafts are respectively connected with the driving device, so that the charging barrel and the clamp in the charging barrel can rotate independently, and the purpose of turning over and grinding materials while a workpiece rotates is achieved; under the condition of the same rotating speed, the contact frequency