The invention discloses a single-zone plate type high-temperature electrostatic dust collector and belongs to the technical field of environmental-protection dust collecting equipment. The equipment mainly comprises positive plates, a negative plate, emitter electrodes, a high-temperature power supply, wherein two stainless steel plates are grounded and parallelly arranged to serve as positive plates; a stainless steel plate which has the same shape and size as the positive plates is connected with the negative pole of a high-temperature power supply to serve as the negative plate; the negative plate is suspended in the middle of the two positive plates and parallel to the positive plates; and all disc-like emitter electrodes are embedded on the two sides of the negative plate. In the invention, a single-zone plate type structure is adopted, so the structure of the equipment is compact and the electrical field is uniform, and the stability and reliability of the high temperature operation of the equipment are improved; and the emitter electrode is made of cerium oxide-doped barium-tungsten hot electron emitting material, which contributes to improving dust collection efficiency and prolonging the service life of the equipment.