A　total　of　12　models　in　linear　quadratic,　cubic,　exponential　and　power　forms　using　only　sunshine　hours,　latitude,　and　altitude　were　developed　and　compared　to　estimate　the　daily　global　solar　radiation　on　a　horizontal　surface　for　6　weather　stations　at　plateaus　zone,　China.　The　models　were　compared　on　the　basis　of　statistical　error　tests　using　the　root　mean　square　error　(RMSE),　mean　bias　error　(MBE),　and　adjusted　coefficient　of　determination　(R2).　For　each　individual　station,　the　errors　resulting　from　the　better　equations　are　such　that　R2lies　between　73.039%　in　Lasa　and　92.871%　in　Geermu,　MBE　is　under　0.162(MJ/m2)　in　Yushu　and　RSME　does　not　go　beyond　3.073(MJ/m2)　in　Lasa.　A　general　equation　was　established　for　the　plateaus　zone,　and　the　R2,　MBE　and　RSME　values　vary　from　84.74%　to　85.10%,from　-0.3747　to　0.0396　(MJ/m2)　and　from　2.7224　to　2.7739　(MJ/m2)　respectively.　Results　show　that　the　present　model　can　be　recommended　in　engineering　practice　with　adequate　accuracy.