Straw pulling machine

The invention provides a straw pulling machine which is used for pulling out cotton straw and other crop straw. The straw pulling machine comprises a rack. A main transmission case and an auxiliary transmission case are arranged above the rack, and the main transmission case is connected with the auxiliary transmission case through a power transmission device. The power output ends of the main transmission case and the auxiliary transmission case are connected with a driving shaft, and the tail end of the driving shaft is connected with a driving clamping and holding roll. A driven shaft casing support is fixedly arranged below the rack and is used for being hinged to a driven shaft casing, a driven shaft is arranged in the driven shaft casing, and the tail end of the driven shaft is connected with a driven clamping and holding roll. When the straw pulling machine works, the main transmission case and the auxiliary transmission case transmit the power to the driving shaft, the driving shaft drives the driving clamping and holding roll to rotate, the driving clamping and holding roll drives the driven clamping and holding roll to rotate relatively under the action of the friction force and the extrusion force, and the straws are pulled out under the combination action of the friction force and the extrusion force of the driving clamping and holding roll and the driven clamping and holding roll and the advancing force of a tractor along with advancing of the tractor.