By　using　two-dimensional　flat　plate　heat　pipe　array　with　micro　channels;　the　study　proposed　a　new　solar　collecting　technology　for　flat-plate　solar　collector　and　solar　water　heater　system.　The　study　presented　basic　performance　of　micro　flat　plate　heat　pipe　which　was　applied　on　flat　plate　solar　water　heater;　then　a　new　flat　plate　solar　water　heater　by　heat　pipe　was　invented　successfully　and　its　performance　was　tested;　the　results　showed　that　the　solar　water　heater＇s　maximum　cumulative　efficiency　was　87.82%,　daily　average　efficiency　was　up　to　65.98%,　besides,　the　solar　water　heater　by　micro　flat　plate　heat　pipe　array　does　not　be　limited　by　time　zone　and　area;　furthermore,　it　has　several　advantages　including　low　cost,　antifreezing,　high　pressure　resistance,　compact　and　elimination　of　scale　formation　etc,　which　propose　great　prospect　for　wide-spread　utilization.