Double-roller breaking type corn header stalk pull roller

The invention belongs to the agricultural machine technology field and particularly relates to a double-roller breaking type corn header stalk pull roller which integrates functions of core picking and straw chopping and can make straw chopping length meet soil returning standards. According to the double-roller breaking type corn header stalk pull roller, roller knifes on a first roller knife mounting shaft are arranged in a multi-strip positive spiral mode in a range of one end of a spiral head to which the straw is led to 3/4 length of the first roller knife mounting shaft, the roller knifes on the first roller knife mounting shaft are arranged in a multi-strip reverse spiral mode in a range of one end of a connection seat to 1/4 length of the first roller knife mounting shaft, roller knifes on a second roller knife mounting shaft are arranged in a multi-strip reverse spiral mode in a range of one end of the spiral head to which the straw is led to 3/4 length of the second roller knife mounting shaft, the roller knifes on the second roller knife mounting shaft are arranged in a multi-strip positive spiral mode in a range of one end of the connection seat to 1/4 length of the second roller knife mounting shaft, and roller sheets of the first roller knife mounting shaft are engaged with roller sheets of the second roller knife mounting shaft. The double-roller breaking type corn header stalk pull roller is mounted on a corn cutter, and corn picking and straw chopping are realized.