The invention discloses an electric continuous zooming mechanism with a high-stability image surface. The electric continuous zooming mechanism comprises a zoom lens group, a motor group, a shell, a first limit switch, a second limit switch and a contact, wherein the zoom lens group, the motor group, the first limit switch and the second limit switch are respectively fixed on the shell, the zoom lens group comprises a zoom guide rail group, a zoom light group, a compensating light group, a first cam group and a second cam group, the zoom guide rail group is a gapless rolling guide rail, and comprises an inner zoom barrel, an outer zoom barrel, a bearing seat, an opened pressing ring, a key, a first ball and a second ball. According to the invention, stability of the image surface during continuous zoom in specific environment such as temperature, impact and vibration can be realized, and imaging quality of a zoom system is improved.