Abstract: In order to study the process of strata movement similar material simulation experiment, Brillouin optical time domain analysis( BOTDA) technology was use d to measure strain of similar material simulation. The two optical fibers were embedded in 3 m plane stress simulation and 5 dial gage were installed on the respective pos ition,comparing analysis of Brillouin frequency shift change of strata movement and deformation process. The results showed that BOTDA distributed optical fiber sensing t echnology could realize the distributed strain measurement of similar material simulation,not only could accurately measure the strata collapse state of the fiber along,but a Iso could sense and reflect the movement and deformation characteristics of strata at some point. This research provided a new testing method for similar material simulati on experiment,and had a positive effect on the development of similar material simulation testing technology.