To study the effect of structure parameters (the peripheral number N, radial depth H and axial length L of breakage) of the jacket breakage on the penetrated hole size for penetrating reinforced concrete target of penetrator with enhanced lateral effect (PELE), the orthogonal optimization analysis of PELE which has different structure parameters of the jacket breakage penetrating reinforced concrete targets was performed by means of numerical simulation method and the study of translating the axial kinetic energy of projectile as the lost energy which jacket expanding brokes reinforced concrete targets was carried out by defining lateral effect contribution value. Results show that the largest size of the reinforced concrete penetrated hole is 409 mm, the lateral effect contribution value is the largest, and the lateral effect of PELE is the best, when the structure parameters of the jacket breakage of N=8, H=5.5 mm, L=150 mm are taken. At the same time, the influencing degreel of structure parameters of the jacket breakage on the lateral effect of PELE is that L is maximum, N is second, H is minimum.