Moso　bamboo　is　widespread　in　the　hilly　and　mountainous　regions　of　southeastern　Fujian.　Moso　bamboo　is　extensively　distributed　across　the　hilly　and　mountainous　regions　of　southeastern　Fujian.　To　delve　into　the　unique　vegetation　Moso　bamboo’s　root-soil　composite　and　its　resistance　to　pullout　and　shear　forces,　as　well　as　its　influence　on　slope　stability,　we　conducted　on-site　whole　Moso　bamboo　pullout　tests　and　in-situ　shear　tests　using　bespoke　instruments　on　Moso　bamboo　of　varying　diameters　in　the　landslide-prone　area　of　Zhuangbian　Village,　Linglu　Township,　Yongtai　County　of　Fuzhou.　A　universal　testing　machine　was　employed　to　conduct　single-root　pullout　tests　on　roots　of　varying　diameters　within　the　on-site　root-soil　complex.　The　results　reveal　that　the　diameter　of　Moso　bamboo　influences　its　tensile　strength　during　whole-plant　pullout　tests,　with　larger　diameters　exhibiting　higher　ultimate　tensile　and　shear　strengths.　Both　the　Moso　bamboo　culm　and　rhizome　play　a　crucial　role　in　resisting　pullout　forces.　Moreover,　the　diameter　of　individual　Moso　bamboo　roots　shows　a　linear　positive　correlation　with　the　ultimate　tensile　force　while　tensile　strength　decreases　with　increasing　root　diameter.　Regarding　shear　resistance,　there　is　a　positive　correlation　between　Moso　bamboo　diameter　and　the　shear　strength　of　the　root-soil　composite.　It　is　of　great　significance　in　theoretical　and　practical　implications　for　analyzing　the　mechanical　properties　of　Moso　bamboo　root-soil　composite,　understanding　the　mechanisms　of　geological　disasters　in　Moso　bamboo　forest　slopes,　and　enhancing　the　effectiveness　of　vegetation　in　slope　protection.　©　2024　Institute　of　Engineering　Mechanics　(IEM).　All　rights　reserved.