Strain controlled direct shear apparatus is used to determine shear strength. Under different vertical pressure, exerting shear strength so as to shear and get the shear strength value; Determining the strength parameter according to Coulomb's force principle and cohesion from inside friction angle.

The design is resonable, it releases operator labor strength, improve the testing accuracy. It has manual type function, shear speed ratio in according with national standard requirement, it is easy to operate, stable speed, limit speed construction, it can protect the machine.