The invention discloses a desert hot wind cycle power generation device. A heat reservoir is ellipsoidal and is fixed to an arc heat gathering board through a fixing frame; light reflecting materials are laid on the inner wall of the arc heat gathering board; the arc heat gathering board is fixed in sand through a support; the surface of the heat reservoir is made of a black wrapping iron sheet; the two ends of the heat reservoir are connected with a cold reservoir through an upper air pipe and a lower air pipe; the cold reservoir is in a prolate ellipsoid shape and is laid in the position 3 meters below the surface sand; generator sets are arranged in the upper air pipe and the lower air pipe and in the positions, located in the sand, of the upper air pipe and the lower air pipe. The desert hot wind cycle power generation device is simple in structure, low in manufacturing cost, and capable of emitting high-quality stable current in a harsh desert environment; as the power generation device is closed, the influence of the outer variable windy and dusty environment on the interior is small relatively; the temperature of the heat reservoir is higher through the additional arrangement of the arc heat gathering board; the cold reservoir is laid in the sand and the sand has the good heat dissipation effect, so that the situation of a big up and down temperature difference is formed very easily, larger wind cycle drives the generator sets to operate, and the energy utilization rate is effectively increased.