The invention discloses a CMOS image sensor double-channel data transmission structure and method. The structure comprises a pixel array, a digital image processing module and a channel splicing module, wherein the pixel array is connected with the digital image processing module through the double-channel data transmission structure, and the digital image processing module is connected with the channel splicing module through the double-channel data transmission structure. Image data inputted through double channels are spliced through the channel splicing module according to the original color sequence of the pixel array, and finally the image data are outputted. The transmission efficiency can be improved, and the power consumption of an integrated circuit is effectively lowered.