Abstract: In order to predict the transport and final fate of feed contaminants in the flow field, this paper establishes a three-dimensional transport model of feed contaminants based on the Lagrangian particle tracking model considering the loss processes such as solid settling, wind action, and shoreline adsorption, and carries out simulation experiments of feed contaminant transport using the hydrodynamic field simulated by the FVCOM model as the background field. The experimental results showed that: wind promotes the dispersion of pollutants in the shallow water layer by increasing their movement; forage density determines the vertical distribution of pollutants in the water column; diffusion processes increase the range of pollutant dispersion in the horizontal and vertical directions, allowing pollutants to be mixed and transported in a wider range of waters; and shoreline adsorption restricts the range of pollutant dispersal in the waters, leading to the aggregation of pollutants near the shoreline. This study can provide a scientific basis for selecting the density, location and timing of feed placement, which can help to mitigate the effects of feed pollution.