A method is developed for simultaneous deteemination of nine major and minor elementr (Al, Ca, Fe, K, Mg, Mn, Na,.P，Ti) and thirteen trace elements (Ba, Be, Cd, Ce, Co, Cr, Cu; Li, Sc, Sr, V, V, Zn) in silicate rocks water sedim- eats, dolomite, limestone and quartz by ICP-AES. The sample is decomposed by adding a mixture of HN03, HCI, water and hydrofluoric acid in a new type sealed Teflon bomb.The spectroscopic data were measured by direct reading spectrometer. The RSD of major elements obtained were 0.75-3.6% and of minor and trace elements obtained were 1-15.3%.