基于体心立方（BCC）点阵结构设计了1×1、1×2和2×2点阵结构，利用熔融沉积成型（FDM）技术分别制备80%、100%填充率的1×1点阵结构及100%填充率的1×2、2×2点阵结构，并分别对点阵结构进行0°、90°方向的压缩试验，研究不同填充率、不同胞元数量下的压缩性能的各向异性。结果表明：点阵结构的断裂形式为沿着成型材料的堆叠面开裂；2×2点阵结构90°压缩时的压缩强度、压缩模量、总吸能最大，分别达到0.34 MPa、7.85 MPa和4.31 J，较0°时分别提高了13.3%、11.2%和10.4%，在5%应变后的吸能特性最优；100%填充率的1×1点阵结构90°压缩时的比吸能最大，达到206.15 J/kg，较0°时提高了30.66%。对BCC点阵结构力学性能的各向异性研究，为FDM工艺成型点阵结构的工程应用提供依据。

The 1×1, 1×2 and 2×2 lattice structures were designed based on body-centered cubic (BCC) lattice structure. The 1×1 lattice structures with 80% and 100% filling rate and the 1×2 and 2×2 lattice structures with 100% filling rate were prepared by fused deposition modeling (FDM) technology, and compression tests were carried out in 0° and 90° directions for the lattice structures, respectively. The anisotropy of compressive properties under different filling rates and different number of lattice units were studied. The results show that the lattice structures exhibit a fracture pattern characterized by cracking along the stacking surface of the formed material. The compressive strength, compressive modulus and total energy absorption of the 2×2 lattice structure at 90° compression are the largest, reaching 0.34 MPa, 7.85 MPa and 4.31 J, respectively, which are increased by 13.3%, 11.2% and 10.4% compared with that at 0°, respectively. The 2×2 lattice structure demonstrates superior energy absorption characteristics under 5% strain. The 1×1 lattice structure with 100% filling rate has the highest specific absorption energy at 90° compression, reaching 206.15 J/kg, which is 30.66% higher than that at 0°. The anisotropy of the mechanical properties of the BCC lattice structure is studied, which provides a basis for the engineering application of the lattice structure formed by FDM process.