The invention relates to an active and passive combined ship reactor emergence waste heat discharging system. The active and passive combined ship reactor emergence waste heat discharging system comprises a DC (direct current) steam generator, a first waste heat discharging system, a second waste heat discharging system as well as an input pipe and an output pipe. The DC steam generator is arranged in a safety housing, and the first waste heat discharging system and the second waste heat discharging system are arranged outside the safety housing. When the first waste heat discharging system works, a gaseous coolant flowing out from a first outlet enters a first condensation apparatus to be condensed and then enters a condensation collection box to be collected by virtue of a second outlet,and a water pumping apparatus delivers the coolant in the condensation collection into the DC steam generator via a first inlet; and when the second waste heat discharging system works, the gaseous coolant flowing out via the first outlet enters a second condensation apparatus to be condensed and is then delivered into the DC steam generator via the first inlet. By integrating the advantages of two heat discharging ways, the active and passive combined ship reactor emergence waste heat discharging system is wide in range of suitable accidents, high in heat discharging efficiency and capable of improving the system reliability and safety of power plants at the same time.