The adiabatic shearing behavior of TC4 alloy was simulated using LS-DYNA, and the distribution of equivalent strain, von-Mises stress and temperature rise in the hat-shaped specimen during dynamic loading were obtained. It is found that a large part of plastic strain is concentrated in a narrow deformation area. The temperatures in this area are much higher than those of the matrix material. The equivalent strain, von-Mises stress and temperature rise in each corner of the hat-shaped specimen are highest during all the loading processes. The simulation indicates that the maximum temperature in adiabatic shear band is higher than the recrystallization temperature of TC4 alloy, but lower than its phase transformation temperature, which is helpful to the research of the microstructure deformation mechanism of adiabatic shear band of TC4 alloy.