By using homemade shear equipment

the mechanics characteristic of the weak intercalated layers in the slope rock mass are carried out. The shear stress-deformation curves have the obvious proportion limit

submission and peak stress

which indicate that

at the initial stages of the shear deformation

the shear stress-deformation is linear and the shear stiffness don’t change. With the increase of the vertical stress

the peak shear stress increases linearly. After the peak strength

the shear strength changes little with the increase of the shear deformation

and the remnant strength is approximately equal to the peak

the experiment sample subvert

which is the ‘plastic’ subversion type. The shear deformation can be divided into 3 stages

the strength parameters in every stage vary

for the slope engineering

which must have enough safety coefficient

the low strength parameters are recommended. Basing on the experiment results

it is found that the vertical stress-compression displacement curve is the hyperbola

when the vertical displacement is less than 3.4 mm

the experiment result be more close to the theoretical value. The results will guide the stability analysis and the reinforcement programme design of the high slope.