Given　that　the　performance　of　the　phase　change　thermal　storage　device　(PCTSD)　is　limited　by　the　low　thermal　conductivity　of　the　phase　change　material,　more　effective　heat　transfer　structures　should　be　developed　to　improve　the　thermal　storage　rate.　In　this　paper,　a　novel　micro　heat　pipe　array　(MHPA)-PCTSD　with　a　highly　rational　heat　transfer　structure　is　proposed　to　understand　the　influence　mechanism　of　the　relative　positions　of　the　MHPA　and　heat　transfer　channel.　The　arrangement　of　the　heat　transfer　fluid　(HTF)　channels　on　both　sides　of　the　MHPA　(Type　A)　and　the　arrangement　of　the　MHPA　on　both　sides　of　the　HTF　channel　(Type　B)　are　numerically　modeled　in　three　dimensions,　and　the　thermal　storage　performance　is　analyzed.　Results　show　that　Type　B　has　a　significant　advantage　over　the　traditional　heat　pipe　PCTSD　and　Type　A,　which　can　obtain　better　temperature　uniformity　and　more　reasonable　thermal　resistance　distribution.　Moreover,　its　total　thermal　resistance　and　melting　time　are　17.4%　and　21%　lower　than　those　of　Type　A,　thus　confirming　its　higher　optimization　potential.