The invention provides a galvanizing furnace and belongs to the technical field of hot galvanizing. The galvanizing furnace comprises a furnace body, a furnace cover, a first thermal storage chamber and a second thermal storage device. A first galvanizing groove and a second galvanizing groove are formed in the upper end of the furnace body. A heating cavity is formed in the lower end of the furnace body. The furnace cover is arranged on a guide rail in a left-right sliding manner. A rack is horizontally arranged on one side of the furnace cover. A gear is meshed with the rack. The first thermal storage chamber and the second thermal storage chamber are arranged at the left end and the right end of the heating cavity. The first thermal storage chamber and the second thermal storage chamber are internally provided with thermal storage bodies. The first thermal storage chamber is communicated with the heating cavity through a first nozzle, and the second thermal storage chamber is communicated with the heating cavity through a second nozzle. One end of a first fuel inlet pipe is communicated with the first nozzle, and one end of a second fuel inlet pipe is communicated with a second nozzle. The first thermal chamber is further connected with a first air pipe, the second thermal chamber is further connected with a second air pipe, and both the first air pipe and the second air pipe are connected with a reversing valve. The galvanizing furnace is good in furnace body temperature uniformity, high in galvanizing efficiency and capable of protecting the environment and saving energy.