In order to meet the needs for the integration and miniaturization of CCD imaging circuit, a new high performance imaging circuit system is designed in this paper. Using FPGA as the core of the imaging circuit, configuring the A/D converter to realize analog to digital conversion, coding and synthesizing the converted image data and arranging the data transmission format, realizing the communication between the imaging circuit and the outside by the telemetry and telecontrol three wire interface, so as to receive the auxiliary data on the satellite and the adjustment instructions of the imaging parameters. The experimental results show that the imaging circuit software designed in this paper can meet the test requirements of video processing function of satellite camera. The imaging effect is clear, the hardware circuit is simplified and the software integration is improved. It has high engineering application value.