In order to get the performances of the high-speed video processer in TDICCD mosaic system with high resolution, analyzed the control methods of the video processor parameters and the noise types and their reduction methods in high resolution TDICCD system, and designed an intelligent method of controlling to LM98640 based on FPGA. The functions of time-stretching quantization and sampling adjustment with high resolution were implemented, the noise level of the TDICCD imaging electronics system was decreased, and the SNR of the system was improved. By experiments comparison and analyzing of the image indexes, it is proved that the TDICCD image processing system based on LM98640 could satisfy higher specifications besides of increasing the pixel processing velocity and the image resolutions, and the final SNR of the system could be achieved at 47.4 dB.