The invention relates to a CCD, in particular to a subdivided large-size pixel CCD structure. The large-size pixel CCD structure comprises a vertical CCD structure and a horizontal CCD structure; thevertical CCD structure comprises a first vertical group, a second vertical group, a third vertical group and a fourth vertical group, the fourth vertical group is connected with a synchronous clock line, the synchronous clock line is connected with a clock line of the vertical CCD structure, and the clock line of the horizontal CCD structure is connected with a test clock line; According to the invention, a'vertical CCD splitting-vertical CCD summation-horizontal CCD splitting-horizontal CCD summation 'structure is adopted, and large-size pixels are split into small-size pixels, so that the transfer efficiency of large-image components is improved; On the other hand, in order to keep signal integrity, the sum of the split small-size pixels is obtained, and it is guaranteed that the dynamicrange characteristic is not affected.