Abstract: A design method was studied to optimize the standoff of shaped charge warhead. By experiment, the static state penetration depth of bi-conical liner shaped charge under 6.0, 6.5, 7.0, 7.5 and 8.0 times standoff and 34° and 40° cone angle were obtained. At the same time, a numerical simulation method was researched and verified on the same experiment conditions. Under different top cone angle, the change rule of the penetration depth with the change of standoff was obtained by numerical simulation. A calculation formula including the variables of cone angle and standoff for static state penetration depth of bi-conical liner shaped charge warhead was obtained. The three-dimensional surface was obtained, which indicated that the static state penetration depth varies with cone angle and standoff. Based these, the optimum standoff of bi-conical liner shaped charge warhead was obtained. The result of experiment and numerical simulation and the design method of standoff distance of bi-conical liner shaped charge warhead can provide reference for related research.