Disclosed is a reverse single-working-medium steam combined cycle, belonging to the technical field of thermodynamics, refrigeration and heat pumps. The reverse single-working-medium steam combined cycle refers to, on a working medium composed of M1 kg and M2 kg, a closed process composed of nine processes performed respectively or jointly, comprising: an M1 kg of working medium endothermic vaporization process 12, an M1 kg of working medium pressure boosting process 23, an (M1+M2) kg of working medium endothermic process 34, an (M1+M2) kg of working medium pressure boosting process 45, an (M1+M2) kg of working medium exothermic process 56, an M2 kg of working medium pressure reduction process 63, an M1 kg of working medium pressure boosting process 67, an M1 kg of working medium exothermic condensation process 78, and an M1 kg of working medium pressure reduction process 81.
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