The invention discloses a solar high-temperature reactor integrating phase-change storage energy and chemical storage energy and belongs to the field of solar high-temperature heat utilization. A quartz glass board is connected to the open end of the left side of a reactor shell, a reaction cavity is constituted by the quartz glass board and the reactor shell, a working medium inlet is formed in the left side of the reactor shell, a working medium outlet is formed in the right side of the reactor shell, an overall porous catalyst is arranged in the reactor shell, a phase-change energy storageis mounted on the outer side face of the reactor shell, a phase-change energy storage shell is arranged on the outer surface of the phase-change energy storage, and the phase-change energy storage shell is wrapped with a heat preservation layer. The solar high-temperature reactor can still provide heat energy required by a reaction when illumination is unstable and the solar high-temperature reactor is in a shadow place, and continuous conducting of the chemical reaction is kept; in addition, the temperature of the edge of a porous structure of a chemical reaction layer can be maintained, theradial temperature gradient is decreased while a reaction area is enlarged, and structural collapse caused by stress concentration is prevented; and part of heat in waste gas is recovered to preheat inlet gas.