Multi-working area large-capacity energy saving vacuum sintering furnace

The invention relates to a multi-temperature area large-capacity energy saving vacuum sintering furnace which comprises a furnace shell, a heating chamber, a vacuum system, a cooling system and a PLC (Programmable Logic Controller) automatic control system and is characterized in that a middle heater is installed vertically in the middle of the heating chamber in an axial direction for dividing the heating chamber into two working areas; the back end of the heating chamber is provided with a switchable valve as a cooling gas channel; and the thickness of a heat preservation and insulation layer is increased to 1.5 times of the original thickness. One-time charge batch of the furnace achieves 1500kg; by using a capacity increase method, if products of the same quantity are sintered, the energy consumption of piece weight is obviously reduced; and the land occupation of equipment, operators, operating sequence and operating time are also reduced.