The 93W-4.5Ni-2.1Fe-0.35Co liquid-phase sintered tungsten heavy alloy (WHA) was fabricated by hot-hydrostatic extrusion at 950 ℃ with plastic deformation ratio of 75%. The specimens for dynamic compression tests were taken from the as-extruded WHA rod along three different directions with the extruding direction. The test results show that the adiabatic shear characteristics of WHA are highly anisotropy for different fiber orientations due to the different adiabatic temperature rise in the different micro-strained condition and the distribution of matrix and fiber.