In order to study the influence of the inclination angle of the fracture on the failure and instability of the rock mass and the deformation field, 7 kinds of prefabricated single fissure rock-like samples with inclination angles of 0°, 15°, 30°, 45°, 60°, 75° and 90° were produced. In this way, the ZTRS-210 rock direct shear tester and the non-contact full-field strain measurement system are used for direct-shear testing, and the crack propagation and the full-field strain are simultaneously monitored. The results show that the peak shear stress of rock-like materials shows a trend of increasing-decreasing-increasing-decreasing with the increase of fracture inclination Angle, and the peak shear stress is the maximum when the fracture inclination Angle is 15° and the minimum when the fracture inclination Angle is 60°.With the increase of the crack inclination angle, the failure mode of the specimen changes from coplanar shear failure to tensile-shear composite failure. When the inclination angle is 90°, it is shear failure along the shear plane, accompanied by more secondary cracks; With the same dip Angle, the strain field changes from uniform strain distribution to concentrated strain distribution with the increase of load. The strain mean square error curve is smaller and grows slowly in the micro-crack compaction stage and the elastic stage, and it increases sharply in the plastic stage and the failure stage.The results can be reference for the engineering rock mass stability analysis.