Bag-unpacking machine

The utility model relates to a bag-unpacking machine, a cylinder is arranged on a bracket platform through a supporting system, a slope angle is on the cylinder along the horizontal line, an electric motor drives the cylinder to rotate through a speed reducer and a drive gear, more than ten knife tools are arranged at the external circumference of a cylinder body, and part of the knife tools extend into the cylinder. An interior toothed ring is sleeved outside the cylinder, and the interior toothed ring is arranged on the bracket, a small gear is engaged with an interior toothed ring, and the cylinder rotates to make the small gear and the interior toothed ring to have a relative motion, forcing the small gear to rotate and driving a shaft on the small gear to rotate and making the knife tools which are on the tooth axle to rotate to cut trash bags in the cylinder. The bag-unpacking machine increases the relative motion of the knife tools and rubbish and raises the efficiency of bag-unpacking machine, and the utility model reduces the device ground occupation area. Particularly, since the knife tools are arranged outside the barrel body, the knife tools are more convenient to repair than the prior art.