In　order　to　solve　the　problem　that　the　temperature　fluctuation　of　fresh-food　compartment　in　refrigerator　is　very　big,　and　to　provide　better　storage　environment　for　food,　in　the　freezer　with　phase　change　storage　materials,　a　method　of　delaying　the　change　of　temperature　to　reduce　the　temperature　fluctuations　was　proposed　in　this　paper.　The　phase　change　materials　used　in　the　fresh-food　compartment　in　the　refrigerator　were　tested.　The　results　show　that　the　temperature　fluctuation　of　the　cold　storage　room　in　refrigerator　is　obviously　reduced　after　the　application　of　phase　change　materials,　and　the　range　of　fluctuation　is　reduced　to　1.00℃　from　the　original　2.57℃.　Application　of　phase　change　materials　can　reduce　the　temperature　fluctuation　of　fresh-food　compartment,　and　to　achieve　the　goal　of　small　temperature　fluctuations.　©　2017,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.