In　order　to　improve　the　performance　of　phase　change　heat　exchanger,　this　paper　designed　a　flat　micro-heat　pipe　array　thermal　storage　device　which　paraffin　was　used　as　the　heat　storage　phase　change　material.　The　thermal　homogeneity　of　flat-micro　heat　pipe　array　was　analyzed　by　experiments,　the　paraffin　temperature　distribution　within　the　heat　storage　device　and　the　charging/discharging　power　of　the　thermal　storage　device,　and　the　charging/discharging　heat　transfer　process　of　the　thermal　storage　device　under　different　inlet　temperatures　and　flow　rates　for　the　cold/hot　heat　transfer　fluid　(HTF)　were　studied　by　experiments.　Experimental　results　show　that　the　performance　of　the　flat　micro-heat　pipe　array　is　steady　and　efficient　during　charging/discharging　process,　and　the　average　charging　power　and　the　average　discharging　power　of　thermal　storage　unit　are　approximately　662　W　and　764　W　under　the　experimental　conditions　which　the　cold/hot　HTF　is　2.0　L/min,　hot　HTF　temperature　is　80℃　and　cold　HTF　temperature　is　20℃.　©　2016,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.