The present application relates to a kind of erasable color thermosensitive paper and its preparation method, erasable color thermosensitive paper includes protective layer, thermosensitive
coating and substrate layer, thermosensitive
coating includes yellow thermosensitive
coating, first intermediate layer,
magenta thermosensitive coating, second intermediate layer and cyan thermosensitive coating from top to bottom sequentially, yellow thermosensitive coating is equipped with the protective layer, cyan thermosensitive coating is arranged on substrate layer;Yellow thermosensitive coating,
magenta thermosensitive coating, cyan thermosensitive coating between the color development
temperature difference is not less than 25 DEG C;Yellow thermosensitive coating,
magenta thermosensitive coating and cyan thermosensitive coating are all added with heat-conducting aid.The erasable color thermosensitive paper of the present application, heat is isolated by intermediate layer;By making the color development
temperature difference of yellow thermosensitive coating, the magenta thermosensitive coating, the cyan thermosensitive coating not less than 25 DEG C, full-
color printing can be realized by superimposing three colors;By adding heat-conducting aid of different particle sizes, more efficient erasing effect is obtained.