The present application relates to a high-precision optical lens processing technology and a coating device thereof, and relates to the technical field of optical lens processing; it includes the following steps: S1, material selection; S2, cutting; S3, rough machining; S4, polishing and cleaning; S5, coating Processing: S51, transporting materials; S52, gripping materials; S53, conveying materials; S6, cleaning materials; S7, core extraction; S8, cleaning; after the optical lens is polished, the optical lens is automatically sent to the coating equipment for coating After the coating is completed, the optical lens is automatically blanked, so as to improve the automation degree in the coating process of the optical lens, save the time spent in coating the optical lens, and improve the production efficiency of the optical lens.