High-precision real-time measurement system of rotary drilling rig

The invention provides a high-precision real-time measurement system of a rotary drilling rig. The high-precision real-time measurement system of the rotary drilling rig comprises a magneto-dependent sensor, a revolving speed sensor, a calculator and a display screen; the magneto-dependent sensor, the revolving speed sensor and the display screen are connected to the calculator, and the calculator is a single-chip microcomputer; the magneto-dependent sensor is installed on one side of a drill stem, a magnetic railing ruler is arranged at the strip-shaped position, corresponding to the magneto-dependent sensor, of the drill stem; the revolving speed sensor is arranged on a main power shaft of the drill stem; the calculator is connected with a hydraulic pressure gage of a hydraulic system for driving the drill stem to run in a hole, and the hydraulic pressure gage is in an electronic type; the calculator is further connected with an engine ECU of an engine driving the drill stem to rotate. The high-precision real-time measurement system of the rotary drilling rig is low in cost, low in operation difficulty, high in precision and high in enterprise acceptability.