Abstract: A solid oxide cell (SOC) chip with the double-electrolyte structure and a preparation method thereof are provided. The SOC chip includes two electrolytes, where the two electrolytes are separated by an inner electrode sandwiched between the two electrolytes; a plurality of regularly arranged gas paths is provided in the inner electrode; at least two sides of the inner electrode are covered with side sealing members; outer surfaces of the electrolytes are provided with outer surface elements; the outer surface elements include an intermediate layer, an outer electrode, an inner electrode plate, and an outer electrode plate; the inner electrode is connected to the inner electrode plate; and the outer electrode is connected to the outer electrode plate. The side sealing members each are provided with a multi-layer structure, including an inner sub-layer and an outer sub-layer.