Abstract: Large temporary facilities in high-speed railway construction have the characteristics of large area and deep damage extent, which lead to the difficulties in reclamation. Its reclamation optimal design is the previous condition to determine the reclamation direction reasonably and improve the utilization efficiency of land. Based on the engineering division, reclamation partition setting, reclamation suitability assessment and reclamation input-output analysis of large temporary facilities construction land, by using DEA model to evaluate the efficiencies of different reclamation directions, the reclamation optimization plans were made and Jiangyin prefabrication yard of Beijing-Shanghai high-speed railway was taken as an example to study. The results showed that the area of reclamation, adjusting and non-reclamation area of Jiangyin prefabrication yard respectively were 8.69、5.54 and 1.49 hm2. For the adjusting area, the optimal reclamation directions for the beam making area, the steel processing area and the beam storage zone were agriculture facilities land while the optimal reclamation directions for other sub-zone were forestlands.