Abstract：Based on the field test，the distribution law of internal forces of prestressed anchor cable frame used in soil slope is studied. The law of internal forces under the same grade of anchor forces，the change of internal forces under the various grades of anchor forces，and the distribution of anchor forces in horizontal beams and vertical beams of frame，are proposed. The results show that the maximum positive moment appears at anchoring spot，and the minimum negative moment appears at the middle of the beam. In addition，due to the increase of anchor forces，the moment is linearly increasing. The calculation of internal forces for prestressed anchor cable frame is validated.
