Safety indicating device for open pit coal mine

A safety indicating device for an open pit coal mine comprises a center supporting base and an auxiliary supporting base on the periphery of the center supporting base, supporting plates are arranged on the center supporting base and the auxiliary supporting base, and a multi-angle display area is connected to the supporting plates and over the center supporting base through main stand columns. A lower display area is connected to the position over the auxiliary supporting base through an outer stand column. The whole device is supported through the center supporting base and the auxiliary supporting base which are poured through concrete, and enough supporting strength is guaranteed. The multi-angle display area is arranged at the top of the main stand column, multi-angle simultaneous display can be achieved, and the area of a visible area is increased; the lower display area is located below the multi-angle display area, so that the content of safety indication can be enriched, and safety indication informa