Abstract:In order to solve the high design requirements and limitations to operators and mine,which were brought by traditional mine belt conveyor tensioning form, a kind of automatic tensioning system for a belt conveyor was designed. The tension automatic adjustment of belt conveyor could be ensured in two conditions of the startup and normal operation, to ensure that certain friction was produced between the conveyer belt and the roller, to limit the verticality in each bearing point of sag. So the normal conveying of material can be guaranteed, skid and fault phenomenon of the belt can be avoided, the service life of the belt can be improved.