Abstract:The retaining of anchors is widely used in China,but the principle and calculating method for soil anchor are not clearly understood. In this paper,the tests on soil anchors are carried out based on a deep excavation. The distribution of the friction force on the interface between soil and mortar is obtained through test. The test result shows the distribution of the friction force is not uniform and the stress attenuates along the length of anchor,which is maximal in the orifice of hole and related to the level of friction force. The pullout resistance of anchor is obtained by the test,which is correlative to the mode of grouting and sensitive to the excavating. All provide the basis for engineering design.