Abstract: The initiation ability of shaped charge jet on shelled charge is closely related to the residual head parameters and kinetic energy of penetrated finite thickness target. In order to study the penetration law of shaped charge jet , considering the shape characteristics, some calculation models were established for the parameter calculation of shaped charge jet penetrating target plate and parameter calculation of residual head parameters and residual kinetic energy after jet penetration. X-ray test and DOP test of 50 mm shaped charge jet were carried out to verify the reliability of the calculation models. On this basis, the influence of jet shape, target thickness and standoff on the residual jet head parameters and residual kinetic energy was analyzed for shaped charge jet penetrating finite thickness target plate. The results show that with the increase of the thickness of the target, the remaining head parameters decrease. With the increase of the standoff, the residual head parameters of the primary function shaped jet show a decreasing trend, and the residual head parameters of the constant function and quadratic function shaped jet increase first and then decrease. The residual head parameters of the constant function shape jet always show the largest under different target thickness and standoff conditions. In the aspect of jet residual kinetic energy in penetrating finite thickness target, the jet residual kinetic energy decreases with the increase of target thickness. With the increase of the standoff height, the residual kinetic energy of the constant function shaped jet continues to decrease, and the residual kinetic energy of the primary and secondary function shaped jet decreases first and then increases. When the standoff is less than 4~5 times of charge diameter, the residual energy of the quadratic function shaped jet is the highest. When the standoff is greater than 4~5 times of charge diameter, the residual energy of the constant function shaped jet is the highest.