In　this　study,　the　cabinet　temperature　uniformity　of　a　large　frost-free　chest　freezer　with　an　internal　volume　of　800　L　has　been　studied.　After　analyzing　the　flow　field　and　temperature　field　of　the　freezer　through　numerical　simulation,　two　optimization　methods　were　proposed　to　improve　the　temperature　uniformity　in　the　freezer　cabinet:　redesigning　the　structure　of　the　supply　air　channel　to　ameliorate　the　air　flow;　optimizing　the　position　of　the　supply　air　outlets　and　return　air　vents　to　adjust　the　air　flow　direction.　Results　are　analyzed　qualitatively　and　quantitatively,　which　indicated　that　the　proposed　two　methods　can　effectively　improve　the　temperature　uniformity　in　the　freezer.　It　was　shown　that　the　optimization　effect　of　temperature　uniformity　is　better　when　relocating　the　supply　air　outlets　and　return　air　vents,　and　the　maximum　temperature　difference　of　the　packages　in　the　freezer　was　reduced　from　7.5　°C　to　3.6　°C.　©　2022