The invention relates to an LED lamp simulating a decorating type tungsten lamp. By designing light disturbance grain or saw teeth of an optical path on a light guide column, continuous line light emitting is formed and used for simulating the light emitting effect of the tungsten lamp, when light passes through the light guide column, due to existence of the light disturbance grain, refraction and deflection rates on the different positions are different, and the light output amount on the positions changes. From the lightening effect, the tungsten filament shape and the light type of the traditional decorating type tungsten lam can be displayed clearly, and the reduction degree is over 90%. A light source and the light guide column are arranged in cooperation, a lens is arranged, a partof light passes through the light guide column, and the lightening effect of the design requirement is displayed; the other part of light passes through the lens and used for changing the light outputeffect, and the enhancing and decorating functions are achieved. The inner surface of the light guide column is coated with a reflection film, and the light output efficiency is improved. The LED lamp can be widely used for replacing the decorating type tungsten lamp, modeling can break through limitation of tungsten filament modeling, and the requirements of global users for illumination varietycan be further met.