Preheater with pump for engine

An engine prewarming device with a pump for an automobile cold-start uses ordinary home power and uses a built-in centrifugal pump and an electric heating element to heat up the engine winterization fluid. The device comprises a casing, a blade wheel, a motor and an electric heating element, wherein the casing is provided with a water inlet and a water outlet, the motor is wholly or partly arranged in the casing, the electric heating element is arranged between the casing and the motor and the blade wheel faces rightly the water inlet and integrates with the casing into a centrifugal pump structure. The motor is wholly or partly arranged in the casing, thereby the length in the direction of installing the motor shaft can be very small, the installation space can shrink much and the engine prewarming device can be conveniently arranged in the automobile.