The invention discloses a position monitoring protective device, which not only can monitor the position of a tensioning hammer vehicle, but also can perform shutdown protection on the conveyor according to a monitoring signal, for the tensioning hammer vehicle of a tilt-angle belt type conveyor. The technical problem to be solved by the invention is to adopt the technical scheme as follows: a position detecting sensor is arranged on the hammer vehicle; an acquisition communication tank is arranged in a control room of the tilt-angle belt type conveyor; a monitoring display, a voice alarm and a conveyor control system are arranged in the acquisition communication tank; the position detecting sensor is used for acquiring an electric signal of a position on which the hammer vehicle is located; the acquisition communication tank is used for analyzing and processing the electric signal acquired by the position detecting sensor, and transmitting the analyzed and processed electric signal to the monitoring display and/or the voice alarm and/or the conveyor control system; and the monitoring display and/or the voice alarm and/or the conveyor control system is used for performing corresponding action according to the signal transmitted by the acquisition communication tank. The position monitoring protective device can be applied to a wide variety of fields of tilt-angle belt type conveying equipment.