The invention discloses a torque reduction device for an expanding sleeve fastener of a sintering machine. The torque reduction device comprises a machine body (1), wherein a pressure inducting module(2), an isolating module (3), a timing module (4) and a management module (5) are arranged on the machine body (1); during operation, the pressure inducting module (2) is arranged on the fastener toinduct a pressure condition of the fastener, the isolating module (3) is arranged on an expanding sleeve, the timing module (4) is used for setting operation time of an isolating part, and the management module (5) is used for processing comprehensive information; a stress buffer module (6) is arranged on the isolating module (3) for buffering a part with excessively great stress in an buffer andisolating operating process of part; a replacing hinting module (7) is arranged on the timing module (4) for hinting to replace the isolated and buffered part within certain time; a prompting module (8) is arranged on the management module (5) for giving prompt when part pressure or isolation is inducted to have an anomaly; and torque force between the expanding sleeve and the fastener is isolatedand buffered, so that the machine body is prevented from being damaged.