A preparing method of a three-dimensional shell-imitated material is provided. The method includes preparing a nanometer aromatic
polyamide fiber dissolved solution from aromatic
polyamide fibers in asolvent by utilizing stirring and stripping; mixing a
mica dispersion, a surface modifier and a dispersing agent to obtain a
mica sheet suspension modified with the surface modifier; mixing the micasheet suspension modified with the surface modifier with the nanometer aromatic
polyamide fiber dissolved solution to obtain a
mica-nanometer aromatic polyamide
fiber dispersion; preparing a compositefilm by spraying the mica-nanometer aromatic polyamide fiber dispersion through a spray-assembling method; spraying the
composite film with
zinc oxide nanoparticles; infiltrating the
composite film in
epoxy resin; and performing lamination and
hot press processing to obtain the three-dimensional shell-imitated material. The three-dimensional shell-imitated material has bending stress,
toughness and Young modulus which are far higher than those of pure nanometer aromatic polyamide fiber block materials, and has specific stress and specific
toughness which are far higher than those of shell-imitated materials of the same type. In addition, stability of properties in acidic, alkaline, high-temperature, low-temperature,
radiation environments and other harsh environments is achieved.