Abstract: An electric water pump includes a machine body and a water suctioning unit. The machine body includes a main casing, a motor cover, a heat dissipation cover, a water cooling space between the motor cover and the heat dissipation cover, and an inside housing surrounding an inside chamber. The main casing has a water suctioning space. The water suctioning unit includes a stator around the inside housing within the main casing, a spindle connected to the motor cover, a rotor within the inside chamber, and a vane unit connected to the spindle within the water suctioning space. The spindle has a spindle channel connected between the water cooling space and the water suctioning space.