Underground rotation measurement data azimuth correction device

The utility model discloses an underground rotation measurement data azimuth correction device, which comprises a first single chip microcomputer processor U1 connected with a geomagnetic sensor U2. The geomagnetic sensor U2 is connected with a signal amplification module; the signal amplification module is connected with an optocoupler isolation module OP1; the optocoupler isolation module OP1 is connected with a second single chip microcomputer processor U4; the first single chip microcomputer processor U1 is used for carrying out reset/set control on the geomagnetic sensor; after signals detected by the geomagnetic sensor U2 are amplified by the signal amplification module, the signals are transmitted to the second single chip microcomputer processor U4 via the optocoupler isolation module OP1; and the second single chip microcomputer processor U4 acquires a measurement value of the geomagnetic sensor U2 via A/D conversion, and a threshold value is set according to the acquired measurement value of the geomagnetic sensor U2. According to the underground rotation measurement data azimuth correction device, the problems that measurement jitter is generated by vibration, and measurement accuracy is hard to ensure due to factors such as the width of a compass and the rotation speed can be solved.