In order to study the influence of the floating state of the bait boat on its stability, and to provide reasonable guidance for the installation position of the feeding machine, the bait boat developed by Shanghai Ocean University is taken as the research object, and the computational fluid dynamics method and overlapping grid technology are used to calculate the floating state of the bait boat and its righting arm curve under different working conditions. Thereby the influence of the floating state of the bait boat on its stability was analyzed, and the best installation position of the feeding machine was obtained. The results show that the impact of the floating state of the bait boat on its stability can not be ignored. Under the same load, the different installation positions of the feeding machine will cause different degrees of trim by bow or stern. The greater the trim angle, the worse the stability, and the stability of the bait boat is the best when it is upright; The fixed installation position does not guarantee that the bait boat remains upright under different loads. It should be installed in a position that can make the bait boat upright when fully loaded. The overall stability is best when the feeding machine is installed in the F position (X=-40.85 mm). The overall layout of the bait boat should also ensure that the trim angle is equal to zero when fully loaded.