Push-broom camera has been widely applied to aviation and spaceflight remote sensing for the earth.Due to its big optical gain, it is prone to laser jamming. Jamming problem of laser to push-broom camera is noticed at all times. In allusion to jamming effects and mechanism difficulty problem of laser to push-broom camera, a jamming experiment system of laser to push-broom camera has been constructed. Laser jamming experiment to push-broom camera has been done, experiment result is presented. Laser jamming mechanism was analyzed on basis of the configuration of linear CCD detector and image processing principle. The relation of camera pupil entrance laser power and image jamming area was established using experiment data. Most factor of affecting camera image jamming area was analyzed. Jamming of laser to push-broom camera and gaze camera was compared. This result can be used for evaluating laser jamming effect to push-broom camera and researching camera laser protection method.