Abstract: The operating performance of particle accelerators has been seriously affected by the electron cloud effect (e-cloud). The secondary electron yield (SEY) is one of the main factors for judging the e-cloud. The secondary electron emission (SEE) and the e-cloud can be effectively suppressed through laser-etching the inner surface of the vacuum chamber. Oxygen-free copper (OFC) has become the first choice for the vacuum chambers of modern accelerators due to its high electrical conductivity, high thermal conductivity, and effective radiation shielding properties. Due to the long construction period of the vacuum chambers in the particle accelerators, the laser-etched components will inevitably face the problem of long-term storage during their manufacturing, installation and commissioning. In this paper, the oxygen-free copper was treated by laser-etching technique, and the surface characterization and SEY were measured before and after laser-etching. The laser-etched samples were periodically measured for SEY during the two-year storage to study the influence of atmospheric storage on SEE. The results show that the SEY of the laser-etched OFC rises gradually as the storage time increases, which can be ascribed to the change in the surface chemical state. The paper aims to provide a feasible method for the surface treatment of vacuum chambers in modern accelerators and experimental support for the storage of laser-etched components.