The invention mainly relates to a skin moisturizer containing peony essential oil. The skin moisturizer is prepared from the following raw materials in parts by weight: 2-4 parts of the peony essential oil, 1-3 parts of peony seed essential oil, 0.5-1 part of paeonol, 10-30 parts of aloe juice, 0.5-1.5 parts of banana quereetin, 0.2-0.6 parts of vitamin E, 0.2-0.8 parts of polyethylene glycol, 3-7 parts of glycerinum, 0.5-1.5 parts of citric acid, 0.2-0.8 parts of triethanolamine, 0.1 parts of lauryl sodium sulfate and 50-70 parts of water. The skin moisturizer integrates multiple functions of resisting oxidization and irritability, shrinking pores, realizing antibiosis, diminishing inflammation, removing acne, relieving itching, suppressing stains, removing grease, retaining moisture, moistening the skin, enhancing smoothness and elasticity, preventing and restoring wrinkles and microgrooves, clearing away free radicals, delaying aging and the like, takes natural plant extracts as the raw materials, does not have side effects and has an obvious treating effect after being used for a long time.