Carbon fiber chopping machine

The invention discloses a carbon fiber chopping machine which comprises a machine frame, a machine box, a rubber roller device, a cutter roller, a pneumatic motor, a product collecting hopper and an air amplifier. The lower end of the product collecting funnel is connected with an air amplifier through a bent pipe; the case comprises a case body and a case cover; the cutter roller is embedded in the box body, and the rubber roller device is arranged in an inner cavity of the box body in a sliding mode. The rubber roller device comprises a rubber roller and a rubber roller adjusting mechanism; a wire inlet is formed in the right side of the box cover; and a yarn guide device capable of doing reciprocating motion is arranged on the yarn inlet. A pneumatic motor is adopted to drive a cutter roller and a pneumatic air amplifier to convey finished products, a body is not provided with an electric device, the chopping machine is a closed machine box except a feeding port, chopped products enter a conveying pipeline