Low-coherence dynamic light scattering (DLS) technique can be used to obtain dynamic characteristics of particles from dense suspensions,in which the multiple scattered light can be effectively suppressed by use of low-coherence interferometer.Based on the single-scattering theory,the measurement region is usually limited to the vicinity of solid-liquid interface.Influences of wall-drag effect close to the interface on particle sizing in low-coherence DLS are investigated.Particle sizes are measured for polystyrene latex particles volume fraction of 10％ with different radii using the phase modulated low-coherence dynamic light scattering measurement.The results are corrected by considering wall drag effects.It is found that the measured values of particle radii agree to the given values for different samples with the standard deviations within 5％ in the region of 10-30 μm close to the interface.As a result,considering the wall-drag effect close to the interface,the accurate particle size information can be obtained near the interface region in the path-length resolved measurement of low-coherence DLS.