Uniform heating annealing furnace for tantalum and niobium processing

The invention discloses a uniform heating annealing furnace for tantalum and niobium processing, and relates to the field of annealing furnaces. When the cover plate and the oven body are pushed to be closed, the cover plate can be automatically closed, so that the cover plate is prevented from being opened, when the cover plate needs to be concavely opened, the handle is pulled to enable the cover plate to make contact with the locking state and be pulled open, and therefore the cover plate is more convenient to close and open; in the process of closing the cover plate, a first sliding plate, a second sliding plate and a third sliding plate are automatically sucked into the furnace body, and when the cover plate is opened, the first sliding plate, the second sliding plate and the third sliding plate automatically slide out of the furnace body, and then annealed tantalum and niobium metal can be taken out; and the tantalum and niobium metals can be more conveniently put into the furnace body and not taken out