The invention discloses an acne-removal cosmetic composition containing a purslane herb extract and a preparation method thereof. The acne-removal cosmetic composition is prepared from the following raw materials of purslane herb extract, mulberry leaf extract, pine needle essential oil, betaine, liquorice root extract, loquat leaf extract, a moisturizer, an emulsifier, a pH (potential of hydrogen) regulator, a thickener and water. The acne-removal cosmetic composition has the advantages that under the cooperation function of the purslane herb extract, the mulberry leaf extract, the liquoriceroot extract, the loquat leaf extract and the pine needle essential oil, the high-efficiency and safe antibacterial effect is realized, and the propionibacterium acnes, mites and other skin parasiticbacteria colonies can be quickly killed; the inflammation and acne forming due to invasion by bacterial promoters can be prevented, and the function of diminishing inflammation is realized; the function of controlling oil is realized, the excretion of grease is inhibited, the hair follicle is dredged, the metabolism of keratinocytes is accelerated, the death cells at the skin surface are stripped,the acne scar is removed, the injured skin is repaired, and the unevenness at the surface of the lesion is eliminated.