Abstract: In order to solve the big error,low efficiency and other problems of the traditional mechanic needle type compass applied in underground mine,a mine intrins ic safe mode geologic compass was designed and realized with the application of the digitalized instrument technology. A magnetoresistive and acceleration sensor was ap plied to the data acquisition technology. An optic- electric integration design was applied to the structure of the compass with two sets of the laser orientation and laser( pro jection) measured inclination laser modules added. A simulated instrument panel, analog level calibration and digital display were applied to the operating interface. A speci al geologic occurrence measuring program was designed to the software of the compass and the geologic occurrence could be measured in a semi intelligent. The applied experiments showed that the compass could make an azimuthal measurement with a degree of 0° ~ 360° and inclined measurement with a degree of 0° ~ 90° and the readi ng error could be eliminated. An auxiliary laser could realize a non- contact measurement,could improve the safety cofficient,working efficiency and measuring accuracy of the operator in the underground mine field and other dangerous environment and could widely applied to the mine geology,gerologic survey and other area.