Abstract: In order to better analyze the seismic site effects of land reclamation areas and provide scientific basis for earthquake-resistant design of engineering construction, this paper takes the DongJiang Port land reclamation area in Tianjin as an example. It uses integrated short-period flow seismometers to collect ground motion noise at the site and analyzes the consistency of H/V curve peaks based on noise level and horizontal-to-vertical spectral ratio (H/V ratio) method. Based on long-term observations at 26 fixed points, the ground motion noise at the site is collected, and a normalized profile map is obtained by normalizing H/V curve data using a conversion formula based on excellent frequency and depth. The analysis reveals unstable H/V peak values in the low-frequency range below 50-200 m depth, suggesting weak wave impedance interfaces caused by backfill soil exist in shallow layers, with relatively obvious soft sediment interfaces near depths of 50-200 m. The dominant frequencies at the site are between 0.6 Hz and 1.6 Hz, with amplification factors ranging from 1.96 to 3.99 times lower limit. This study provides some reference value for estimating site effects in Dongjiang Port land reclamation area.