The invention relates to the technical field of electronic water pumps, in particular to a liquid-cooled electronic water pump which comprises a pump base, a pump body arranged at the top end of the pump base and a
pump head installed at one end of the pump body, the electronic water pump can conduct liquid cooling heat dissipation so as to be free of external environment limitation, liquid cooling is higher than traditional
air cooling efficiency, the temperature of a motor can be accurately controlled, and the service life of the motor is prolonged. Operation heat is absorbed by liquid in the sealing cover and then is discharged through the leading-out
pipe, the environment temperature and
humidity are not interfered, the electronic water pump is matched with scenes such as
semiconductor plants and data
machine rooms, and meanwhile through the arrangement of the
waste heat dissipation
assembly, after the electronic water pump is stopped, cooling liquid in the water drainage box is sprayed to a pump body and cooling fins through a water drainage head of a liquid drainage
pipe for
waste heat dissipation; the cooling liquid after heat dissipation finally flows into the receiving box to be collected, the whole process is uninterrupted, the temperature of the motor in the pump body can be slowly reduced to a safety interval, damage of
waste heat to core components of the pump body is effectively avoided, the overall service life is prolonged, and the operation stability during follow-up starting is guaranteed.