Body armor, also known as bulletproof vest, is used to protect the human body from damage caused by warheads or shrapnel. The bulletproof vest is mainly composed of two parts: the jacket and the bulletproof layer. The jacket is usually made of chemical fiber fabrics. The bulletproof layer is made of metals (special steel, aluminum alloy, titanium alloy), ceramic sheet (corundum, boron carbide, silicon carbide, alumina), glass fiber reinforced plastic, nylon (PA), aramid, DOYENTRONTEX Fiber, liquid protective material, polyimide fiber (PI) [2] and other materials to form a single or composite protective structure. The bulletproof layer can absorb the kinetic energy of the warhead or shrapnel, and it has a significant protective effect on low-speed warheads or shrapnel, which can reduce the damage to the human chest and abdomen under the control of a certain depression. Bulletproof vests include infantry bulletproof vests, flight personnel bulletproof vests and artillery bulletproof vests. According to the appearance, it can also be divided into bulletproof vest, full protective body armor, women's body armor and other types.