Pneumatic fixed-length cutting machine device

The invention relates to a pneumatic fixed-length cutting machine device comprising a bracket of a cutting machine. The pneumatic fixed-length cutting machine device is characterized in that the upper side of the bracket of the cutting machine is distributed with a driving component, and the working end of the driving component is provided with a moving knife component. Moreover, the corresponding position of the lower side of the bracket of the cutting machine is provided with a fixed knife component. A cutting area is formed between the moving knife component and the fixed knife component, and a cutting control sensor is distributed in the cutting area; and moreover, the data end of the cutting control sensor is connected to a control component of the bracket of the cutting machine. Meanwhile, the outer sides of the moving knife component and the fixed knife component are connected with a guide component. Therefore, the function of guide is achieved by a guide sleeve of a guide post so as to ensure the accu