The invention discloses an atmosphere box type sintering furnace for producing a mobile phone back plate. The atmosphere box type sintering furnace comprises a furnace body, a filter box, an extraction opening, an atmosphere opening, a furnace door, a tail gas treatment box and a temperature controller, wherein a heat preservation material is arranged inside the furnace body, a degreasing pipe isinstalled on the side face of the filter box, the degreasing pipe is connected with a draught fan, the extraction opening communicates with the furnace body, the furnace body can be vacuumized beforesintering, the atmosphere opening is connected with a storage tank, nitrogen can be introduced into the furnace body, a cooling box is installed in the furnace door, the tail gas treatment box is installed on the side surface of the furnace body and can be used for filtering and treating flue gas during colloid discharging and sintering, a smoke outlet and an explosion-proof pipe are installed atan outlet of the tail gas treatment box, the explosion-proof pipe is controlled by an air pressure tester to be opened and closed, and the temperature controller is controlled by a PLC element and isconnected with a power supply and a heating device through wires to control the temperature inside the furnace body. According to the atmosphere box type sintering furnace for producing the mobile phone back plate, the colloid discharging and sintering are integrally processed, so that the production efficiency is improved, the labor force is reduced, and the mobile phone backboard ceramic is efficiently and stably sintered.