Emergency residual heat removal system for pressurized water reactor

The invention relates to an emergency residual heat removal system for a pressurized water reactor. Comprising a secondary side waste heat removal pipeline for pumping or passively conveying condensate water to at least one steam generator by virtue of gravity, the containment heat export pipeline is used for pumping condensed water to a containment or passively conveying condensed water by virtue of gravity; the heat exchange pipeline is respectively communicated with the secondary side residual heat removal pipeline and the containment heat export pipeline; and the heat exchange pipeline is a heat exchange water tank for respectively exchanging heat with the secondary side waste heat discharge pipeline and the containment heat export pipeline. Active and passive combination of residual heat removal is achieved, rapid and efficient operation can be achieved in the early stage of an accident, long-term stable operation can be achieved in the later stage of the accident working condition, meanwhile, redundant