A　metal　plate　cooling　model　for　400x　single　concentrator　solar　cells　was　established.　The　effects　of　the　thickness　and　the　radius　of　the　metal　plate,　and　the　air　environment　on　the　temperature　of　the　solar　cells　were　analyzed　in　detail.　It　is　shown　that　the　temperature　of　the　solar　cells　decreased　sharply　at　the　beginning,　with　the　increase　in　the　thickness　of　the　metal　plate,　and　then　changed　more　smoothly.　When　the　radius　of　the　metal　plate　was　4　cm　and　the　thickness　increased　to　2　mm　or　thicker,　the　temperature　of　the　solar　cell　basically　stabilized　at　about　53　degrees　C.　Increasing　the　radius　of　the　metal　plate　and　the　convective　transfer　coefficient　made　the　temperature　of　the　solar　cell　decrease　remarkably.　The　effects　of　Al　and　Cu　as　the　metal　plate　material　on　cooling　were　analyzed　contrastively,　and　demonstrated　the　superiority　of　Al　material　for　the　cooling　system.　Furthermore,　considering　cost　reduction,　space　holding　and　the　stress　of　the　system,　we　optimized　the　structural　design　of　the　metal　plate.　The　simulated　results　can　be　referred　to　the　design　of　the　structure　for　the　metal　plate.　Finally,　a　method　to　devise　the　structure　of　the　metal　plate　for　single　concentrator　solar　cells　was　given.