Marine engine external circulating water system capable of automatically controlling water distribution

The utility model discloses a marine engine external circulating water system capable of automatically controlling water distribution, which is characterized in that an external circulating water main water inlet pipeline is communicated with an auxiliary equipment circulating pipeline and an engine external circulating pipeline, and an engine internal circulating water path is provided with a first temperature sensor for measuring the temperature of engine internal circulating water; a second temperature sensor, a water pump and a pressure sensor for measuring the water outlet pressure of the water pump are installed on the main water inlet pipeline, a first electric flow control measuring valve and a third temperature sensor are installed on the engine outer circulation pipeline, and a second electric flow control measuring valve and a fourth temperature sensor are installed on the auxiliary equipment circulation pipeline. And a fifth temperature sensor for measuring the medium of the auxiliary equipment is