Rock triaxial and direct shear portable test device and test method thereof

The invention discloses a rock triaxial and direct shear portable test device and a test method thereof, and relates to the field of rock triaxial tests.The rock triaxial and direct shear portable test device comprises a bottom supporting piece, a top supporting piece, a loading plate, a loading unit and a steel plate spring, the loading plate is parallel to the loading face of a loading head and slidably arranged between the bottom supporting piece and the top supporting piece, and the loading unit is arranged between the loading plate and the top supporting piece; a to-be-pressed sample is arranged between the bottom supporting piece and the top supporting piece, and two axial to-be-pressed surfaces of the to-be-pressed sample are arranged corresponding to the protruding end of the steel plate spring; the loading unit is used for pressing the loading plate to move so as to compress the steel plate spring, the protruding amount of the steel plate spring is used for extruding the to-be-pressed sample from the