High vacuum densification method (HVDM) is recommended for ground improvement. To obtain the most economic and reasonable construction parameters, two test-areas, zone A and zone B, are performed in steel stock yard and goods yard respectively. Post testing results indicate that, in zone A, the allowable bearing capacity reaches at least 225 kPa, average SPT value of sand layer in 0~8m reaches 20.6 blows and average CPT Ps value of sand layer reaches 7.48 MPa. In zone B, the allowable bearing capacity reaches at least 196 kPa, average SPT value of sand layer in 0~7m reaches 17.0 blows and average CPT Ps value of sand layer reaches 6.21 MPa. This project, which is a typical ground improvement case for projects using Changjiang fine sand for reclamation, offers a valuable reference for similar projects.