Landslide early warning system is an effective tool to reduce the rainfall induced landslide hazard. Warning system against single landslide has a huge potential based on reliable physical mechanism. However

the complicated system usually involves many parameters and algorithms so that it is not widely acknowledged until now. In our study

we constructed a relatively simple landslide technical warning system based on an infinite slope model in the laboratory. The details which include warning idea

calculation of warning time

and information transmission are introduced. Experimental results from physical model validated the performance of this technical warning system under the scenes of different rainfall intensities and the initial water contents. Although the errors caused by soil erosion

and uncertainty of slip surface

and disagreement of initial water content

the technical warning system is still proved to have a reliability in the evaluation of the physical landslide model failure.