The invention relates to a preparation method of an algal polysaccharides toner, comprising the following steps of: putting cleaned grateloupia filicina into an oven for baking, pulverizing by a universal pulverizer, sieving; then adding double distilled water according to a solid-to-liquid ratio, putting into a water bath of 100 DEG C, staying for a period of time in the boiled water bath; centrifuging by a high-speed centrifuge, taking the supernatant, performing rotary evaporation by a rotary evaporator until the supernatant is 1/4 of the original volume, adding absolute ethyl alcohol, standing in a refrigerator of 4 DEG C; then centrifuging by the high-speed centrifuge again, taking the precipitate, adding a proper amount of water for dissolving, evaporating by the rotary evaporator to remove the ethyl alcohol to obtain the algal polysaccharides extracting solution; and stirring the algal polysaccharides extracting solution, double distilled water, rose essence and a preservative imidazolidinyl urea uniformly to obtain the natural algal polysaccharides toner. The algal polysaccharides toner has the advantages of simple process, easiness of control, stable system, no toxic side effect, efficacies of moistening, anti-wrinkling, whitening, diminishing inflammation, promoting tissue regeneration, resisting aging and the like, and broad market prospect.