The invention discloses a mine machine transmission device which comprises a groove conveying belt and a motor. The motor is arranged in the groove conveying belt and is embedded and connected in thegroove conveying belt. A groove is formed in the surface of the groove conveying belt, and the groove is embedded in the groove conveying belt. Rolling shafts are arranged at the left end and the right end of the groove conveying belt, and the rolling shafts are embedded in the groove conveying belt. A solid support is arranged below the left side of the groove conveying belt, and the solid support is welded in the groove conveying belt. The mine machine transmission device has an oblique transporting function, container transporting is achieved, the transporting efficiency is high, a connecting wire of the motor penetrates a hollow supporting frame and is connected with a maneuvering device, disordering of wires in a mine can be prevented so that accidents can be avoided; and during transporting work, a top cover can be installed when shielding is needed, when shielding is not needed, the top cover can be demounted together with a detachable movable buckle, the top cover must be usedduring oblique transporting at ordinary time, and therefore ore falling can be prevented.