The disturbance experiment of 3CCD detector is represented in this paper. In the experiment,the 3CCD are irradiated by 488 nm,532 nm,671 nm continuons wave (CW) laser and the single-point saturation threshold is measured. The results show that three pieces CCD of 3CCD response to the laser which is out of its responsible waveband. The laser can make them saturation. It offers beneficial experiences to the further researches.