Rock shearing fracture surface boundary depicting device and method

A rock shearing fracture surface boundary depicting device and a method are disclosed. A support cylinder, a rotation sleeve and a support seat are included. The support cylinder is installed on the support seat. An operation platform bottom is connected to the support seat. A rock sample is located on an operation platform. A center section of the rotation sleeve is fixedly connected to a vertical rod. The vertical rod is inserted into and is installed on a bearing in the support cylinder. An upper portion of the support cylinder is provided with a rotation bearing. One end of a diagonal rod is connected to the rotation bearing. The other end of the diagonal rod is connected to the rotation sleeve. A horizontal interlocking bar is movably installed in an internal portion of the rotation sleeve. A depicting probe body is connected to a left end of the horizontal interlocking bar. A rotation handle is connected to the rotation bearing of the depicting probe body. An outer cylinder of a paintbrush is connected to a right end of the horizontal interlocking bar. An electronic paintbrush is inserted into the outer cylinder of the paintbrush and is fixed through a rotary knob. An electronic drawing board is arranged below the electronic paintbrush. The electronic drawing board is connected to a computer. By using the device and the method, problems that a personal error of rock shearing surface area calculation is large, operation is difficult and so on can be solved; and procedural depicting of a rock shearing fracture surface is realized.