In order to provide parameters of mechanical properties for designing Ramie cutter and for analyzing of kinetics of shearing process, this paper investigated the mechanical properties of the ramie bottom stalk in harvesting period. Bending and twisting tests showed bend shear modulus were 155.7 MPa and 252.9 MPa and shearing modulus were 42.1 MPa and 44.8 MPa for stem and xylem respectively. The tensile elastic modulus were 1 876 MPa and 481 MPa and the compression modulus were 154.2 MPa and 50.9 MPa for Xylem and elongated layer respectively according to stretching and compression test. Then micro mechanics research methods of composite materials was applied to the stalk and determined the following parameters: the tensile elastic modulus, compression modulus of elasticity, PRXY and NUXY was 1 552 MPa, 102.4 MPa, 0.22, less than 0.099 for the stem respectively; and for the xylem, PRXY was 0.72 and NUXY less than 0.068; bend shear modulus, shear modulus, PRXY and NUXY of elongated layer was 72.3 MPa and 24.2 MPa, 0.05 and less than 0.335 respectively.