In high-power lasers, nonlinear hot image is likely to damage expensive optics. The location and intensity of hot image of plane light wave has widely been studied. However, in the operating lasers, the light beam possesses a limited spatial width. Based on the aberrationless model of self-focusing, the location and intensity of hot image of Guassian optical beams is investigated. It is shown that the location and intensity of hot image greatly differ from those of plane light wave when the Guassian beam has a small beam waist, while they approximately equal those of plane light wave for a very big beam waist.