The invention provides a peony flower powder nutritional tablet and a preparation method thereof. The peony flower powder nutritional tablet is prepared from peony flower powder, pumpkin flower, cornstigma, peony petals, peony stamen, cortex moutan, fresh milk, honey and auxiliary materials. The peony flower powder nutritional tablet has the advantages of simple and reasonable process, environment-friendly and healthy products and no use of any chemical pigment and preservative. All the raw materials are ultra-micro crushed so as to be maximally crushed, so that functional ingredients can bemaximally extracted, the quality is stable, and the function is significant. Not only can the product supplement various nutritional elements, but also can improve the immunity, resist fatigue, maintain beauty and keep young, and delay senescence.