Abstract: In order to test the performance of the video sampling circuit of the CCD(Charge Coupled Device) controller for an Antarctic CSTAR (Chinese Small Telescope Array) and verify low temperature reliability, a CCD video waveform generator based on FPGA is designed for generating the video waveform output by CCD detector. A computer can communicate with the video waveform generator through the USB2.0 interface, which can change the amplitude, period, rising edge time and the superimposed noise of the waveform. The performance of the circuit can be fully tested at different temperatures by setting the waveform with different parameters and input to the video sampling circuit of the CCD controller, which not only improves test efficiency but also effectively avoids potential risks during installing the CCD test. The test results show that the performance of the video sampling circuit of the CCD controller meets the requirements and can work stably as low as -80℃.