A data cartridge device for computer equipment includes a data cartridge which is assembled in an interior of an outer cover, so to be provided with a shock-proof effect. Widths of two side walls of the data cartridge are effectively decreased to reduce entire size of the data cartridge, and an upper and a lower layer of the outer covers are stacked with each other to effectively utilize a storage space. By the modularized design of the outer covers and the data cartridges, the present invention can be flexibly applied to outer housings with various heights (such as an industrial computer cabinet, or a server cabinet).