Abstract: Seed cotton feeding machine is a kind of mechanical equipment with auto feeding function of seed cotton in cotton processing industry. MSZY-15 movable seed cotton feeding machine adopts feeding roll structure， belt rectification device and movement device in the design， solves the problems of fire caused by strike of barbed nail， belt transport deviation， difficult movement and so on， and achieves the continuity and accuracy of seed cotton freight yards feeding. ANSYS structural analysis software used in the design conducts structural analysis on key parts to ensure the reliability of the machine. MSZY-15 movable seed cotton feeding machine improves the seed cotton feed efficiency， reduces the machine failure rate by using a ginning season.