The invention discloses a method for improving the dielectric temperature stability of barium titanate-based ceramic based on component gradient. The method comprises the following steps: doping TiO2 and BaCO3 base materials with Sn<4+> ions, carrying out a traditional solid phase synthesis preparation technology, and pre-burning the synthesized solid to obtain barium titanate-based ceramic powders having different curie temperatures; designing the components and the sequence of gradient materials by adopting a component corresponding to the tricritical point (tricritical effect) of the above sysyem as a core, tiling the powders layer by layer, and compacting the tiled powders to form a block; and carrying out solid phase sintering to obtain barium titanate-based gradient ceramic, and cutting the obtained cylindrical ceramic along the component change direction by a fretsaw cutter to obtain two flat cross sections in order to realize the improvement the dielectric temperature stability of ferroelectric ceramic through parallel component gradient. The method improves the temperature stability on the basis of keeping the high dielectric constant of the barium titanate-based ceramic, provides a new idea for the optimization of the performances of multilayer ceramic capacitors (MLCCs), and is simple to operate.