Cold　thermal　energy　storage　(CTES)　technology　is　one　of　effective　ways　to　utilize　renewable　energy　and　shift　peak　power　load.　In　this　paper,　a　novel　CTES　device　using　micro　heat　pipe　arrays　is　numerically　studied　and　optimized.　Firstly,　the　Taguchi　method　is　adopted　to　quantitatively　analyze　the　contribution　ratio　(CR)　of　fin　parameters　to　solidification　and　melting　time,　as　well　as　compactness　factor.　Fin　height　has　the　highest　CR　of　approximately　70　%　for　solidification　and　melting　time,　while　fin　thickness　with　the　highest　CR　of　58.88　%　for　the　compactness　factor.　Then,　the　response　surface　method　is　used　to　uncover　the　interactive　effects　of　fin　parameters　and　operation　parameters.　Next,　multi-criteria　optimization　is　performed　by　minimizing　solidification　time　and　heat　exchange　temperature　difference,　and　maximizing　the　compactness　factor.　Compared　with　the　original　structure,　the　solidification　time　of　optimized　structure　is　reduced　by　26.59　%　with　small　heat　exchange　temperature　difference　of　4　degrees　C　and　great　compactness　factor　of　0.8219.　Additionally,　the　phase　change　front　of　the　original　and　the　optimized　CTES　device　are　compared　and　analyzed　to　further　reveal　the　reason　for　the　performance　improvement　of　the　device.　The　research　results　provide　inspiration　and　data　support　for　the　practical　application　of　CTES.