Abstract: In this papor,the stress-strain behaviour of weathered sand under different stress paths in the planestrain condition is analyed。The stras-strain relations under stress paths of constant stress ratio can be modellde with power function,Under several stress peths after Ko-consolidstion,the stress strain laws are described with amodified hyperbolic curve。The variation of model parameters is discussed。The prperoed model can be utiIized tosimulate the effects of stress path in stres-strain analysis of soil。