The invention belongs to the technical field of 
cosmetics, and discloses a double-layer 
mask and a preparation method thereof. The double-layer 
mask provided by the invention comprises an inner phase and an outer phase, specifically, 
betaine and 
allantoin can effectively replenish water, preserve 
moisture and prevent pachylosis, 
oleum butyrospermi parkii strengthens a water locking barrier and improves fine wrinkles, andpowerfulnatural 
antioxidant astaxanthin in 
haematococcus pluvialis can enhance the 
cell regeneration capacity, efficiently resists 
ultraviolet damage and eliminates excessive free radicals. The double-layer 
mask provided by the invention has a very good synergistic effect through the components, so that the 
skin is tender, fine, smooth, bright, smooth and glossy, the 
skin is younger, the double-layer mask is convenient to carry, the efficient effect of the active ingredients is exerted by one concentrated essence mask, the efficient moisturizing effect can be achieved, and the double-layer mask is suitable for people to moisturize and maintain the 
skin for a long time and is also suitable for people on business trips or traveling to quickly moisturize, quickly improve the skin state and meet higher 
skin care requirements of people.