Based on the analysis of the characteristics of the beam splitting when a laser beam passes through a single attenuator, a pair of attenuators with V-type and parallel arrangement, methods are given for the characterization of the beam energy splitting, beam center spacing, and their overlapping parts for N-attenuators. Two effective solutions are explored, and details of the design and application methods are presented. The results show that there is an optimal incidence angle that can maximize the spacing of all levels of speckles. For common attenuating materials with a refractive index in the range of 1.4 to 1.7, the optimal incidence angle is in the range of 48° and 50°. Therefore, by making full use of the optical transmission characteristics of attenuators with V-shaped and parallel-shaped arrangement, rationally placing the attenuators, and using the beam stop scientifically, speckles at all levels can be effectively removed and an ideal single beam spot can be obtained.