Responses of NPP of salinized meadow in hyper arid area to global change were predicted using the NPP model,developed by the author to simulate the NPP of natural salinized meadow in northern part of Tarim Basin.The result shows that the NPP of salinized meadow in hyper arid area is the function of underground water table(UWT) and the temperature in given soil conditions.The NPP of salinized meadow decreased with increase of underground water table.Responses of NPP to change of UWT and temperature increase resulting from global change vary with different UWT of salinized meadow in hyper arid area.The impacts of global change to NPP of salinized meadow,therefore,depend on differing UWT of salinized meadow.It is extrapolated that responses of NPP of salinized meadow to global change are more sensitive with greater UWT than those with shallower UWT.