The invention relates to the agriculture machinery, and specially relates to a multifunctional straw corn combined harvester comprising a vehicle body; the vehicle body has a power system, a transmission system, a walking system, a turning system and a braking system, a straw harvesting system and a corn harvesting system; the multifunctional straw corn combined harvester can finish corn harvesting, corn straw chopping harvesting, stubble ploughing and transportation in one time, thus improving working efficiency, greatly reducing laboring and material investment, finishing rush-harvesting task, and brining considerable economic benefits for the tractor driver.