The utility model provides a geological compass that can measuration fast, include through pivot articulated upper cover and base that the axle head face of pivot has vernier dial, upper cover and pivot synchronous revolution are gone up inner surface of the cover and are equipped with the reflector, be equipped with circular level and coaxial steering wheel of arranging and azimuth circle on the base, its centre of a circle pivoted magnetic needle can be wound to last being equipped with of azimuth circle, still is equipped with on the base to be used for realizing magnetic needle locking and the magnetic needle switch that loosens, and the tip of pivot still is equipped with the blowout patche that indicates the angle dial that inclines, and the blowout patche setting is in vernier dial's outer lane. The utility model discloses reading of geological structure surface incline and inclination is accomplished for one step to the ability, improves work efficiency. When measuring at the inclination, can bring up to 0.5 degree with measurement accuracy through vernier dial to improve measurement accuracy.