A new experiment method for determining parameters of soil water movement is put forward, which is that two parameters are determined in the same one experiment According to the principle of detemvning undisturbed soil sample parameters, a new device is designed and introduced. Through successive correction of the assumed soil water characteristic curve by iteration method, unsaturated hydraulic conductivity of the undisturbed soil sample is obtained. At the same time, the soil water characteristic curve of the soil sample is also obtained.