Coal mine underground drilling track measuring device and system

The invention discloses a coal mine underground drilling track measuring device and system, and belongs to the field of drilling track measuring. A coal mine underground drilling track measuring device comprises a main shaft. A liquid injection assembly; an air exhaust mechanism; and a sampling mechanism. In the drilling process of the drill bit, when angle deviation occurs, deviation of the drill bit can be detected, marking liquid can be injected into a drilled hole, it is convenient to distinguish deviation parts when a soil layer of the hole is sampled subsequently, and it is convenient for personnel to analyze the soil layer of the part where the drill bit is promoted to deviate; by means of the technical scheme, personnel can know the reason for drill bit deviation, automatic sampling of the soil layer in the hole is achieved, and therefore the personnel can detect the soil layer of the hole and select a proper pipeline to be installed in the drilled hole after drilling is completed, the service life of