The invention relates to the technical field of distributors, and particularly relates to a sealed distributing device which comprises a distributing device main body, a fixator, a lifting platform, a speed reducer and hydraulic rod groups, wherein the fixator is arranged on the distributing device main body, the lifting platform is arranged at the top end of the fixator, the speed reducer is arranged on the lifting platform, the hydraulic rod groups are symmetrically arranged at two sides of the fixator, and the hydraulic rod groups are connected with the lifting platform; an upper fixing structure is arranged at the upper end of the fixator, a lower fixing structure is arranged at the lower end of the fixator, and an upper end sealing structure is arranged at the upper fixing structure. According to the sealed distributing device, firstly, the upper end sealing structure can prevent combustible gas in a pyrolyzing furnace from leaking to the outside while moving up and down in the distributing device main body, and secondly, driving is achieved by rotation of the main body shaft of the distributing device so as to achieve the effect of shifting materials, thus ensuring normal pyrolyzing efficiency, and meanwhile avoiding the bad working conditions of burnthrough and unsymmetric burning in the furnace during operation of the pyrolyzing furnace.