Abstract: In the experiment of 532 nm CW laser irradiating linear CCD camera, we found the entirely saturated unilateral smear phenomenon which is different from the smear phenomenon described previously. In order to analyze the characteristics of the entirely saturated unilateral smear, the relationships of the smear length with laser power, integral time and drive frequency were measured in experiment. The smear length was found to increase along with the increase of laser power and integral time, but was independent with the drive frequency. This relationship was consistent with that of electric charge collecting quantity with laser power density and integral time. Through calculating in theory and measuring in experiment, we found that the smear length was related with the product of laser power density and integral time, and the relation expression of smear length and electric charge collecting quantity was educed . These analyses could provide a data basis to the mechanism of the entirely saturated unilateral smear phenomenon.