Liquid-crystalline elastomers (LCEs) are a type of smart materials that can produce macroscopic reversible deformation under external stimuli (such as heat, light, electricity, magnetism, etc.). Only LCEs that are aligned can exhibit macroscopic reversible deformation. Dynamic covalent bonds can be reversibly broken and regenerated under certain conditions, which can change the topological structure of traditional covalent cross-linked networks. Introducing dynamic covalent bonds into LCEs enables a new strategy to align the material. Liquid-crystalline elastomer reversible three-dimensional structures have certain three-dimensional shapes and can produce reversible deformation under external stimuli, which can be used in biomedicine, tissue engineering, aerospace, and flexible robots. In order to obtain liquid-crystalline elastomer reversible three-dimensional structures with more complex shapes and multiple deformation modes, the liquid-crystalline elastomers can be three-dimensionally aligned or assembled based on the orientation method of dynamic covalent bonds. This article reviews the processing methods of the liquid-crystalline elastomer reversible three-dimensional structures based on dynamic covalent bonds, and analyzes the challenges and opportunities in this field.