This invention provides a plant preservation treatment method for flowers, leaves, and stems, etc., including a production method from flower to root (including a treatment method of recovering the original appearance of the original strain). Said method is to treat the plant selectively with pretreatment, dehydration, decolorization, whitening, activation, coloring, drying, processing assembly, and formation, so that the new flowers, stems, and/or leaves are preserved with their natural condition, gloss, and elasticity completely without withering, thereby preserving the blossom for a long period of time. In addition, this invention also provides various plant treatment solution compositions.