To solve the problem of the poor reliability of monitoring locomotive position relying on laying on the track in letter coal mine transport information system. The paper proposes a coal mine transport information system which not relying on track sensors. The system adopts strapdown inertial navigation and designs the coal mine transport information system of motor vehicle's own set of precise positioning. Mainly introduces the algorithms of strapdown inertial navigation and the hardware scheme of vehicle positioning. The experimental test of this system proves a good result.