According to the definition of Honest Roes’ ‘Taxonomy for documentation’， animation documentary is also an integral part of documentary, but it is a rich way of expression.
Taking the sinking of the Lusitania as the demonstration object. First, it is a picture recorded frame by frame. Secondly, it restores the sinking process and facts of the Lusitania through hand drawn animation pictures. Animation documentaries restore history based on facts, and are supplemented by images, which is a good carrier of documentaries. Finally, through the combination of words and pictures, the author explained the historical event of the sinking of the Lusitania to the audience, which enabled the audience to obtain this information truly and effectively, so it was defined as an animated documentary.