The utility model discloses a cotton stalk cutting device of drum -type, cut the cylinder including rack and hand hay cutter, the rack sets up circumference one side of cylinder is cut to the hand hay cutter, the rack includes stationary knife and the set knife seat who is used for installing the stationary knife, the hand hay cutter cut the cylinder include central roller and with the cylinder curb plate is cut to center roller both ends fixed connection's hand hay cutter, the hand hay cutter is cut and is provided with crushing shell fixing base and cutter fixing base between the cylinder curb plate, the crushing shell fixing base with install crushing shell and cutter on the cutter fixing base respectively, be formed with the accommodation space between crushing shell and the cutter, the crushing shell with the stationary knife cooperatees brokenly with cotton stalk, the cutter with the stationary knife cooperatees and cuts off cotton stalk. The utility model discloses the process that the adoption of well cotton stalk cutting device of drum -type is broken, the combination was cut to the hand hay cutter arranges that the elder generation carries out the breakage to cotton stalk, then cuts off for the resistance that cuts off that the cutter received when cutting off cotton stalk reduces, reduces the load of cutter and the wearing and tearing of cutter.