The invention provides a long-lasting moisturizing skincare composition. The composition is prepared from the following raw materials in parts by weight: 1.1-3.9 parts of sodium hyaluronate, 2-11 parts of polyalcohol, 34-46 parts of active ingredients, 0.08-0.3 part of preservative, and 0.05-0.25 part of polyhexamethyleneguanidine phosphate. The long-lasting moisturizing skincare composition has asafe and reasonable formula, and delivers good using experience; effective components can go deep into skin epidermis rapidly, thereby moisturizing the skin timely for a long time and making the skinbright, smooth and moist.