The present invention provides a protective device for avoiding optical lens surface scratch, and the protective device can avoid scratch caused by the lens storage box carrying. The protective device mainly includes a box body, lens holders and a lens holder support. The lens holder support is putted in the box body, and the box body is provided with a dust cover. The inner wall of the lens holder is provided with multi-step annular stepped faces, wherein, the multi-step annular stepped faces are in a cone-shaped distribution mode on the whole, and the inner diameter of each step of the annular stepped faces is larger than the inner diameter of a non-work face of the optical lens to be putted so as to ensure the non-contact placement of the optical lens. The inner wall of the lens holder is symmetrically provided with a trough passing through the multi-step annular stepped faces so as to take out and put lens conveniently. The protective device has the simple structure and saves the space, a plurality of lens with various sizes can be putted in the same lens holder through the multi-step annular steps, and the optical lens can be exactly putted on the annular stepped face which is suitable for the outer diameter of the optical lens.