A data storage device fixing structure includes a mounting frame, a resisting member, and a limiting member. The resisting member is movably arranged on the mounting frame and configured to resist a data storage device. The resisting member includes a resisting portion. The limiting member is provided on the resisting member and provided with a fixing portion. The fixing portion extends into the data storage device located in the mounting frame to fixedly mount the data storage device. When the limiting member is moved, the fixing portion is separated from the data storage device, the resisting member is pulled, and the resisting portion drives the data storage device to move.