A device fitted in automatic door which helps door to close automatically known as Automatic door actuator. Automatic door actuator contain a motor that control the motion of the door. These devices makes our work easier and are reliable for opening and closing different kinds of door. It is electrically powered and easily to operate. Actually these high quality linear actuator is just not useful in door closer but it also useful in health and safety purposes; By keeping in mind that all doors are kept closed at all times actuator can save us from spread of fire and smoke through burning buildings.