The invention discloses a non-stop running technology for a TRT (blast furnace gas residual pressure power generation device) during blast furnace damping down, and relates to the field of TRTs. In the non-stop running technology for the TRT during the blast furnace damping down, the phenomenon that the temperature of the TRT is too high can be avoided. The non-stop running technology for the TRT during the blast furnace damping down has the following key points: a turbine host runs electrically, and a pressure reduction valve group is switched on completely; suction force can be generated by the electric running of the turbine host, so that blast furnace gas can return to a gas inlet of the turbine host from a gas outlet of the turbine host through the pressure reduction valve group and cyclically flows in a TRT system to bring away heat accumulated by the TRT system to form a balance between heat absorption and heat release, and the phenomenon that the temperature of the TRT system is increased is avoided; the turbine host serving as a motor runs, so that the direction of gas flow is changed, and a vibration value or a displacement value of a rotor shaft of the turbine host can be increased; however, the influence caused by the change of parameter values is small, and the influence value is far lower than an alarming value and is within an allowable value range set by a factory.