The invention provides a facial mask paste and a preparation method thereof. The facial mask paste is mainly composed of a traditional Chinese medicine ultramicro powder and milk. The traditional Chinese medicine ultramicro powder is mainly prepared from the following raw materials: dandelion, rhizoma cimicifugae, radix saposhnikoviae, ligusticum chuanxiong, cortex phellodendri, radix polygonati officinalis, cortex moutan, radix angelica sinensis, peach kernel, wax gourd kernel, white paeony root, radix ampelopsis, white poria cocos, lemon, radix ophiopogonis, aloe, radix astragali, purslane,rose and liquorice. The preparation method includes the steps: (A) drying dandelion, rhizoma cimicifugae, radix saposhnikoviae, ligusticum chuanxiong, cortex phellodendri, radix polygonati officinalis, cortex moutan, radix angelica sinensis, peach kernel, wax gourd kernel, white paeony root, radix ampelopsis, white poria cocos, lemon, radix ophiopogonis, aloe, radix astragali, purslane, rose and liquorice, mixing evenly, grinding into crude powder with 60 mesh or more, and then carrying out ultramicro crushing to form the traditional Chinese medicine ultramicro powder; and (B) stirring and emulsifying the traditional Chinese medicine ultramicro powder and milk to obtain the product. The facial mask paste has pure natural ingredients, is green and environmentally friendly, and has comprehensive effects of excellent performance.