The invention discloses a high-efficiency low-noise automobile electronic water pump and relates to the technical field of automobile cooling systems. The high-efficiency low-noise automobile electronic water pump comprises a spiral case, an impeller, a spindle, a rear pump body, a motor, a controller and a sealing end cover; the controller is electrically connected with the motor; a supporting plate positioned at the front part of the rear pump body is provided with a plurality of first through holes; an axial through hole is formed in the internal axial direction of the spindle; the rear endcover is provided with a plurality of second through holes; a part of high-pressure liquid at the outlet of the impeller inside the spiral case flows back to the inlet of the impeller after sequentially passing through the first through holes, the second through holes, the axial through hole and a reflowing hole which is formed in the impeller; the inlet of the impeller is provided with a large-belly flow channel; a partition bolt is obliquely arranged inside the spiral case, so the high-efficiency low-noise automobile electronic water pump can overcome the problems about low efficiency, large noises, liable burning loss of a controller in the prior art and the like; and the high-efficiency low-noise automobile electronic water pump disclosed by the invention can realize intelligent speedregulation according to cooling requirements, is beneficial for improving the running efficiency and the cooling effect, reduces noises and is convenient to mount and dismount.