Abstract: The pure nickel liner of shaped charge was prepared by using a direct current electroforming technique. The high speed deformation mechanism of the jet formed by explosive detonation in the electroformed nickel liner of shaped charge was discussed by comparing the microstructure and microtexture of the nickel liner of shaped charge before and after explosive detonation. Experimental results show that the original grains with a columnar shape change to equiaxed grains and fibber textures existed in the nickel liner of shaped charge disappear due to high speed explosive detonation. The jet and slug formed by explosive detonation undergo an adiabatic process. A melting phenomenon was observed due to the interaction between the jet and target, and a Fe-Ni alloy is formed. The melting Fe-Ni alloy forms a complex structure by solidification around the surface of the slug when it meets the following slug. It is indicated that dynamic recovery and recrystallization play an important role for high speed deformation in the electroformed nickel liner of shaped charge during the explosive detonation process.