Lattice frame anchor structure is an effective engineering measure in landslide control and widely used in the reservoir area of the Three Gorges Project. The design theory and method of the structure are studied systematically. On the basis of the force analysis of prestressed cable lattice beam

mechanical model of lattice frame anchor structure is proposed and the formula of deformation and inner force of the beam with finite and infinite distance conducted respectively. The engineering design demands

steps and methods are put forward according to the research. Taking Taijitou landslide in Badong County of the Three Gorges reservoir region as an example

lattice frame anchor structure is applied to the control project design; and the design process is introduced in detail.