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Corn is one of the most important crops in the world.The mass of corn stubble is a potential huge resource because of its great percentage in the whole corn stalks.To well resolve the problems of harvesting and smashing corn stubble,the mechanical properties of corn stubble were studied using the universal electronic testing machine.The relations between the largest tensile resistance,the strength of extension stress and the modulus of elasticity of single corn stubble with the diameter of the corn were found out in this study,the related regression equations were obtained.Through experiments,it was found that the length tensile,speed and sampling time are the three important factors that can influence the largest tensile resistance and extensionstrength of single corn stubble.The research results show that with different length tensile,loading speed and sampling time,the relation between the largest tensile resistance and the strength of extension of single corn stubble with the diameter of single corn stubble is the power function,and the related regression equations have been obtained.This study offers a theoretical guidance to the design and improvement of the working parts of soil separation machinery,farming machinery and straw crushing machineries.