The invention discloses a two-section rotating pyrolysis reactor. The two-section rotating pyrolysis reactor comprises a cylinder body, a kiln hood, a pyrolysis gas outlet, a partition plate, an air inlet pipe, a feed pipe, a first pushing spiral plate, a second pushing spiral plate, a first guide pipe and a second guide pipe. According to the two-section rotating pyrolysis reactor, in the operation process, heating in the cylinder body can be carried out in an internal heating mode, and the heat efficiency is high; basically just the solid-phase heat source in the combustion section enters the pyrolysis section through the first guide pipe, impurity smoke is prevented from being mixed into pyrolysis gas, the quality of pyrolysis products is guaranteed, and subsequent treatment is convenient.