For higher measurement accuracy of linear charge coupled device (CCD), a new method of using CCD was proposed. Several linear CCDs were fit together, and staggered by the distance of H/N, H was space between pixels, N was CCD amount. The photo electric signals were collected in-phase by multicenter A/D, and saved in memorizer. Then accurate value was obtained through analyzing all these data. Diameters of 5.000 mm, 8.000 mm and 12.000 mm of three standard poles were measured by single CCD and two staggered CCD with 30 mm stagger long. The result showed that accuracy using two staggered CCD was twice as high as that using single CCD. The method could avoid space between pixels astriction theoretically, so higher measurement accuracy was gained.