An electronic water pump comprising a hydraulic part, and a brushless motor part and a control part, wherein the hydraulic part comprises a pump housing and an impeller; the brushless motor part comprises a rotor and a housing assembly, wherein the housing assembly comprises a stator assembly and an injection molded housing, wherein the stator assembly is formed by one-piece injection molding, wherein the housing assembly is formed by overmolding, and the stator assembly is enclosed inside the injection molded housing to be self-sealing, wherein the housing assembly further comprises a rotatory shaft and a shaft base, wherein the rotatory shaft and the shaft base are both embedded in an interior of the injection molded housing, wherein the stator assembly comprises a stator injection molded body; the control part comprises a control panel and a rear end cover; and the brushless motor part is arranged between the hydraulic part and the control part 1, wherein. the impeller and the rotor form an impeller rotor assembly by one-piece injection molding 2, and wherein the impeller comprises an impeller main body and a blade, the rotor comprises a rotor core and a magnetic steel, the rotor core is provided with a magnetic steel groove, the magnetic steel is installed in the magnetic steel groove, the rotor core and the magnetic steel are enclosed inside the impeller main body to form a first impeller rotor assembly 3, wherein the rotor further comprises a shaft sleeve, wherein the shaft sleeve is overmolded into the first impeller rotor assembly to form a second impeller rotor assembly, and the second impeller rotor assembly is connected with the blade to form the impeller rotor assembly 4. the hydraulic part comprises a pump housing and an impeller; the brushless motor part comprises a rotor and a housing assembly, wherein the housing assembly comprises a stator assembly and an injection molded housing, wherein the stator assembly is formed by one-piece injection molding, wherein the housing assembly is formed by overmolding, and the stator assembly is enclosed inside the injection molded housing to be self-sealing, wherein the housing assembly further comprises a rotatory shaft and a shaft base, wherein the rotatory shaft and the shaft base are both embedded in an interior of the injection molded housing, wherein the stator assembly comprises a stator injection molded body; the control part comprises a control panel and a rear end cover; and the brushless motor part is arranged between the hydraulic part and the control part 1, wherein. the impeller and the rotor form an impeller rotor assembly by one-piece injection molding 2, and wherein the impeller comprises an impeller main body and a blade, the rotor comprises a rotor core and a magnetic steel, the rotor core is provided with a magnetic steel groove, the magnetic steel is installed in the magnetic steel groove, the rotor core and the magnetic steel are enclosed inside the impeller main body to form a first impeller rotor assembly 3, wherein the rotor further comprises a shaft sleeve, wherein the shaft sleeve is overmolded into the first impeller rotor assembly to form a second impeller rotor assembly, and the second impeller rotor assembly is connected with the blade to form the impeller rotor assembly 4.