Abstract：Based on analytical solution derived from deformation coordination equation of hypothesis elastic foundation beam and Winkler foundation model，the interaction mechanism between lattice beam and slope rock mass is analyzed，depending on Shunxichang landslide treatment engineering in Zhongxian county. Lattice beam with cross section 0.4 m×0.5 m and anchor rope with space 4 m×4 m are designed. Factual variation of inner force of lattice beam is obtained in the process of loading，and then the assignment of anchor forces in the longitudinal beam and transverse beam is discussed mainly. In field test，the interaction mechanism between lattice beam and slope rock mass is considered，and the problems that the parameters of rock mass are difficult to be determined accurately by numerical method and the complex situations that are difficult to be solved by analytical method are overcome. It has reference value for optimal design of lattice beam structure. slope rock mass；interaction；field test
