Lattice materials are a class of engineered materials with artificially designable microstructures

with excellent multi-physics field manipulation capabilities in mechanics

acoustics

and thermodynamics

and exhibit broad application prospects in the field of smart structures. Although the development of additive manufacturing technology has significantly enhanced the shape complexity of lattice materials

its limitations in build size and manufacturing efficiency still impede the integrated fabrication of large-scale complex structures

which has become a key technical bottleneck for their engineering application. To address this

this paper proposes a prefabricated assembly construction method using standard unit cells

which enables configuration flexibility and manufacturing feasibility for large-scale lattice materials in complex structures via modular construction and spatial assembly. In terms of structural configuration

octahedral lattice unit cells serve as the basic components

with two connection strategies developed: Bolt joints for flexible material systems and bionic plug-in joints for rigid ones

enabling modular assembly for diverse application requirements. For flexible structures

linear actuators are integrated to construct an actively deformable wing structure

which achieves local deformation control with a maximum thickness adjustment range of 25 mm and a maximum surface inclination angle of 12°. For rigid structures

a lattice sandwich cockpit prototype is constructed

and a homogenized finite element model is established for static mechanical analysis

resulting in a bending stiffness of 2564.1 N/mm and a torsional stiffness of 1409 N·m/deg. The research results indicate that this assembled lattice structural system

while maintaining lightweight properties and high performance

possesses good assembly flexibility and cross-scale adaptability

thereby offering an effective configuration and manufacturing solution for the engineering application of smart structures and lightweight aircraft components.