Full-automatic pneumatic grinding machine and method thereof

The invention discloses a full-automatic pneumatic grinding machine which comprises a rack and a dust collecting chamber. A grinding device is arranged in the dust collecting chamber; a material conveying device for inputting and outputting materials to the dust collecting chamber is arranged at the lower end of the grinding device; an adjustable fixture for clamping the materials is arranged on the material conveying device; an air blowing device for blowing away workpiece grinding ash is further arranged in the dust collecting chamber; and a powder dust outlet is formed in the bottom surfaceof the dust collecting chamber and is connected with a dedusting device. The full-automatic pneumatic grinding machine provided by the invention is high in adaptability, wide in use range, and capable of automatically dedusting a workpiece during grinding and being prevented from causing harm to a human body and an air environment; and secondly, a sufficient pre-tightening force or a precompression force can be ensured,