Large scale tilted-L-shaped chiral nanostructures were fabricated using oblique angle deposition on polystyrene nanosphere templates. SiO2 layer is deposited on the polystyrene nanosphere templates and the Ag layer is deposited on the SiO2 layer to form a metallic arm of tilted-L-shaped chiral nanostructures. Another metallic arm is deposited in the perpendicular direction on the polystyrene nanosphere templates directly. The chirality of tilt-L-shaped chiral nanostructures originated from the different altitude of two metallic arms. By manipulating the thickness of SiO2 layer the circular dicroism can be easily manipulated. Finite element method was used to perform the simulation of tilt-L-shaped chiral nanostructures. Simulation results demonstrate that the circular dicroism mechanism of tilt-L-shaped chiral nanostructures can be explained by chiral plasmonic Born-Kuhn model.