Abstract: As a common marine geologic disaster, submarine landslide often has the characteristics of large volume, fast speed, significant disaster-causing effect and huge range of impact, which often causes serious damage to marine engineering structures, resulting in significant economic losses and casualties, seriously threatening the ocean engineering construction and resource development, especially dangerous to submarine pipelines and cables which are both essential for offshore energy transport and international communication, so regarding the dynamic process of submarine landslide impacting submarine pipeline, a physical model test device consisting of a transparent cubic tank, an automatic valve to release landslides, adjustable slopes and a simulated pipe with four pressure sensors to measure the impact force and lifting force during the whole impact process is developed, which accurately simulates the interaction between the submarine landslide and the pipeline, and investigates the force characteristics of pipeline under the impact of landslide and obtains informative test data. Based on the images and data from the test, the process of submarine landslides sliding and impacting pipelines could be summarized as four stages to clarify the mechanism of it: erosion initiation, impacting pipeline, passing pipeline, landslide accretion. Different from previous studies that only focused on the impact force on pipelines along the slide, both the impact force and the vertical lifting force which may also lead in pipeline destabilization when pipelines are struck by landslides are focused in this model test, contributing to a more comprehensive understanding of the interaction mechanisms between submarine landslides and pipelines. The test data uncover the influence of submarine landslide volume, landslide slope, submarine pipeline diameter and span height on the impact force, which is systematically analyzed by illustrating the time history and peak force of these different factors. It is found that both peak impact force and lifting force occur at the beginning of the impact on the pipeline when the landslide front reaches the pipeline, then the impact force decreases sharply to near zero, while the lift force also decreases but ultimately remains oscillating around a small residual value. The impact force of submarine landslide on pipeline is directly proportional to the slope volume, the square of the landslide velocity, and the diameter of pipeline, while the peak impact force on the pipeline is negatively correlated with the span height of the pipeline. Furthermore, the peak value of vertical lifting force is about 1/5 of the peak impact force. Compared with empirical formula, the phenomenon and analyzed results of the modeling test shows that finer soil particles are more apt to be eroded by water and prone to turbidity currents, suggesting the particle gradation of submarine landslides affects the motion state and impact characteristic of submarine landslides to some extent, which is not considered in this test and to be further studied. The results of this study can not only deepen the understanding of the interaction behavior between submarine landslides and pipelines, but also provide a scientific basis for the submarine pipeline design and safety assessment of submarine pipeline systems for future.