A thermal power plant centralized control auxiliary early warning device includes a heat dissipation shell, an early warning device is arranged in the heat dissipation shell, each of two sides of theearly warning device is fixedly connected with one end of each of a plurality of heat conduction rods, each of two sides of an inner wall of the heat dissipation shell are fixedly connected with the other end of each corresponding heat conduction rod, the top of one side of the heat dissipation shell is fixedly connected with one side of a dust collection box, an upper part of the dust collectionbox is open, one side of the inner wall of the dust collection box is fixedly equipped with a conveying wheel, the conveying wheel is a tooth conveying wheel, the top of the other side of the heat dissipation shell is fixedly equipped with the same conveying wheel, the conveying wheel on the heat dissipation shell is provided with a power device, the power device is a motor, and the tops of both sides of the heat dissipation shell are provided with strip-shaped grooves respectively. The thermal power plant centralized control auxiliary early warning device provided by the invention completes dust cleaning and air cooling heat dissipation just through the conveying wheels and a first conveyor belt, dust prevention and heat dissipation of the early warning device are organically combined, the structure is relatively simple, the real-time monitoring of the thermal power plant through the early warning device can effectively reduce potential safety hazards, an accurate alarm function is realized, and popularization and use are facilitated.