Processing method of 3D graph on 3D structural member

The invention discloses a processing method of a 3D graph on a 3D structural member. The method comprises the following steps: coating the whole surface of the 3D structural member with a photosensitive substance in a darkroom; then selectively exposing and developing a photosensitive layer on the 3D structural member by using parallel light to obtain a 3D pattern track; and electroplating a nickel layer on the selectively exposed 3D structural member in the darkroom. The non-3D graphic track area on the 3D structural member is still coated with the photosensitive layer; therefore, during electroplating, the nickel layer is only attached to the 3D pattern track, so that a nickel layer 3D pattern is obtained, then electroplating is carried out on the nickel layer 3D pattern to obtain a final 3D pattern, and the method has the advantages of being fewer in process step, short in period, beneficial to reducing the process cost and suitable for batch production. Moreover, parallel light isadopted for selective exp