: Laminated bamboo lumber is a bamboo material that flat laminates were glued by adhesives and compacted into mould. Side-pressure laminated bamboo lumber has a good mechanical property. In order to explore its mechanical properties under axial compression, an experimental study was carried out in 6 groups of 18 specimens with differents slenderness ratio. The relationships between various parameters and slenderness ratio were analyzed, and the failure modes of specimens under different slenderness ratios were discussed.The test results indicate the mechanical process of side-pressure laminated bamboo lumber has experienced the stages of elasticity, elastic-plastic and failure. With the increase of slenderness ratio, the failure mode changes from material strength failure to buckling failure, and the material strength failure has obvious ductility property. The comparison between various specifications was made to put forward the formula of bearing capacity under axial compression, and some suggestions on the design of side-pressure laminated bamboo column in practical engineering were given.