Based on the data of hydrogen and oxygen isotope and deuterium excess (d) in water in ShanShan, this paper analyzed the distribution rule of δD、δ18O and d in different water, got the relation between the main make-up source of groundwater and surface water which indicate that in groundwater δD varies from -87.88‰ to -65.97‰ and δ18O from -9.4‰ to -12.37‰,while in surface water d is from 14.12‰ to~32.19‰ and δ18O is from -10.08‰ to -13.63. The results indicate that both groundwater and stream water are derived from the rainfall and experience the stronger role of evaporation; the hydraulic relation of groundwater and surface water is weaker, the groundwater in deep aquifer is mainly recharged by the intensive infiltration of stream water in the proluvial fan, and the groundwater in shallow aquifer mainly receive irrigation infiltration from river in plain area. the hydraulic connection of different deep groundwater is closer,which is a unified groundwater system.