The invention discloses an early-maturing-promoting efficient cultivating method for a sweet potato protected area in the southern Shandong province. An early-maturing, high-yield and high-quality sweet potato new variety Longshu 9 is selected, a three-film covering planting mode and a fresh potato and potato seedling sale production mode are adopted, organic fertilizer is additionally applied inthe production process, the technical means of timely early planting, reasonable close planting, heat preserving and heating, seedling harvesting and scientific management is carried out, and the problems that in the sweet potato early-maturing-promoting cultivating technology, the ground temperature is low, heating is difficult, the survival rate of potato seedlings is low, development is slow, and the sweet potato planting benefits are slightly increased are solved. Compared with a traditional planting method, by means of the method, the sweet potato planting time can be advanced before andafter 25th February, seedlings are harvested starting from the last ten days of April, the seedlings are harvested 3-5 times in the whole sweet potato growth period, about 60,000 potato seedlings areharvested in the area of 666.7 m<2>, fresh potatoes are harvested starting from the first ten days of June, and it is promoted that the fresh potatoes come into the market in advance.