The invention relates to a galvanizing furnace, in particular to a hole peeping mechanism of the galvanizing furnace, and belongs to the technical field of galvanizing furnace equipment. The hole peeping mechanism comprises a transparent cover, heat-resistant glass and a hole peeping seat, wherein the hole peeping seat is connected to a furnace body through connecting bolts; the hole peeping seat is internally provided with a heat-resistant glass mounting cavity; the heat-resistant glass mounting cavity is internally provided with the heat-resistant glass; the front end of the hole peeping seat is connected to the transparent cover through screws; and the transparent cover is used for compressing the heat-resistant glass inside the heat-resistant glass mounting cavity. The hole peeping mechanism is simple, compact and reasonable in structure, stable, reliable and relatively low in cost; and heat-protecting glass can be convenient to change, so that the condition inside the furnace can peep clearly for a long period of time, and the using convenience of the galvanizing furnace is improved.