The utility model discloses a fixing structure of a solar-powered ceramic heat accumulating plate. The fixing structure comprises a fixing seat formed on the top of a building, and a transparent cover plate arranged on the fixing seat, wherein a plurality of fixing grids for accommodating the ceramic heat accumulating plate are formed on the fixing seat; the fixing seat is provided with a clamping groove for fixing the transparent cover plate; the side edge of the transparent cover plate is embedded into the clamping groove, and is used for covering the fixing grids; and the fixing grids are provided with step-down holes which can be aligned and matched with a water inlet pipe and a water outlet pipe of the ceramic heat accumulating plate. The fixing seat is formed by packing cement, and is embedded with reinforcement fabrics and reinforcing rods, so that the fixing seat has a firm and durable structure; the transparent cover plate is embedded in the clamping groove, and is sealed by a double faced adhesive tape and a structural adhesive; and a side plate is provided with a plurality of water outlets, so that leaking water can be prevented from being accumulated inside a fixing frame and influencing the heat absorbing effect.