Abstract: Field measurement of wind characteristics at site of long-span bridges is one of the basic research areas on bridge wind engineering. The wind characteristics parameters based on field measurement can provide a basis for the verification and modification for wind tunnel testing and simulation technology. A long-term and continuous field measurement was carried out with the ultrasonic anemometers and propeller anemometers installed at site of Xi-hou-men Bridge. Based on the data of field measurement, this paper presents the field measurement results of natural wind characteristics of strong monsoon at site of Xi-hou-men Bridge, including turbulent intensities, gust factors, turbulence integral length scales, power spectral density, the profiles of mean wind speed and spatial correlation of gusty wind, and so on. These field measurement results can provide detailed wind characteristics of coastal areas which can be taken as a reference for the design and construction of other similar long-span bridges.