In order to provide reference for the design of harvest machinery and to obtain relevant biomechanical indexes and evaluating methods to choose more superior variety of wheat, the bending ability of wheat stalks under different conditions were studied. Different species of wheat stalks were chosen and cut at different positions. Young′s modulus and bending rigidity under different conditions of gauge length, moisture content and loading rate were measured according to the three point bending principle on the TMS-PRO type Texture Analyzer produced by the FTC company of the U.S. and then studied. The results showed that Young′s modulus and bending rigidity in middle part of the stalks are bigger than those of the upper parts in the same species; the bending rigidity of the wheat stalks was significantly affected by the gauge length, moisture content and loading rate, while Young′s modulus was significantly affected by the gauge length and moisture content，but not by the loading rate.