【Objective】 Stratified rock is a common sedimentary rock type in underground engineering environment, and the rock bolt support technology is widely used to strengthen the stratified surrounding rock in order to study its mechanical response under complex engineering stress environment. 【Method】 Yunnan red sandstone, marble glue, screw and epoxy resin were selected as raw materials. Triaxial compression tests were conducted to investigate the effects of different interfacial dip angles and confining pressures on the mechanical properties of anchored and unanchored stratified rocks. 【Results】 The results showed that the failure of the sample went through the stages of pore compaction, elastic deformation, crack development and macroscopic crack generation, and its strength, deformation parameters and crack growth morphology were significantly affected by confining pressure. The increase of confining pressure can prolong the elastic deformation stage and improve the residual strength and ductility. The failure modes of specimens with different angles under confining pressure are split failure, tensile shear failure and pure shear failure. 【Conclusion】 This study provides strong support for further understanding of rock mechanical properties and engineering applications.