High-strength Kevlar fiber woven fabrics are widely used in engine casing containment.The shear thickening fluid (STF) is found to be effective in increasing the energy absorption capacity of Kevlar fabrics. By designing the stiffener and fixture for the single yarn of fiber, the mechanical property tests at room temperature (20 ℃) are carried out at the MTS material testing machine and the split Hopkinson bar. The quasi-static and dynamic tensile mechanical properties of a single yarn of pure Kevlar fiber and different concentrations of STF treated Kevlar are studied. The effects of quasi-static and dynamic mechanical properties and the effects of different STF solution concentrations on stress limit, elastic modulus and tensile strength are obtained by comparing the failure modes and mechanical properties of fabric in quasi-static and dynamic tests.