The invention discloses a steam generator secondary side passive residual heat removal system. The system comprises: a heat exchanger, which is placed in a cooling water tank, with one end of a condensation water pipe being connected to a lower seal head of the heat exchanger, and the other end being connected to a main water supply pipe of the steam generator; a steam pipeline, one end of which is connected to an upper seal head of the heat exchanger, and the other end of which is connected to a steam outlet of the steam generator; N water-replenishing tanks, the upper parts of which are communicated with the steam pipeline, and the lower parts of which are communicated with the condensation water pipe; M air coolers, the evaporation sections of which are arranged in the cooling water tank, and the condensation sections of which are arranged in the atmosphere outside the cooling water tank. The steam generator secondary side passive residual heat removal system provided by the invention reaches the technical effects of long-term export of core residual heat and maintenance of the reactor at a safe state.