The invention discloses a fixed type self-bearing superheated steam generator in a compound cycle mode. The fixed type self-bearing superheated steam generator in the compound cycle mode comprises a smoke system and a water path system. The smoke system comprises a burner, a radiation hearth, a transitional connection flue, a superheater, an economizer and a chimney which are sequentially communicated in the movement direction of hot smoke. The water path system comprises a boiler fed water inlet, a steam outlet and a pipeline. The smoke system further comprises a double-drum horizontal heat exchanger. The superheater is located below the economizer. The double-drum horizontal heat exchanger is located below the superheater. A double-drum transversely arranged tube bundle is located inside the double-drum horizontal heat exchanger. The effect of injecting superheated steam into an oil layer is good, the recovery efficiency of crude oil is increased, and the heat energy utilization rate is greatly improved. The fixed type self-bearing superheated steam generator in the compound cycle mode is needed to solve the technical problem of high water content of steam.