Alnus formosana is a common dominant species in Wuling area and it is the best tree species for reforestation of Wuling abandoned farmland. This paper explores the reforestation methods and restoration strategies of A. formosana. The results revealed that the traditional flat planting method of A. formosana did not work out, but the innovative method, seedling-pitted concave planting method, effectively raised the survival rate of the planted seedlings (70.6% survival rate after 1.5years of transplanting). The annual growth of the survived seedlings was ca. 90 cm of height and ca. 1.3 cm of ground diameter. To avoid late spring frost and water deficiency, the optimum period for seedlings transplanting in Wuling area was the raining season from mid-April to late-June. Based on the overall analysis of the obstructive factors of A. formosana colonization, we provided suggestive forest recovery strategies by transplanting A. formosana on abandoned farmlands, which can be applied for forest restoration of mid-altitude abandoned farmlands in the future.