The invention discloses an efficient household ventilating fan with a motor forced ventilation and integral heat dissipation structure. The ventilating fan comprises a motor, a wind wheel, a volute and a base, wherein the wind wheel and a rotating shaft of the motor are fixed together through the base, the motor and the volute are fixedly connected with each other, and the motor is completely arranged in the volute. By the ventilating fan, airflow which is generated when a blower of the ventilating fan rotates can forcefully ventilate and dissipate the heat of a motor housing, the unsafety factors of overhigh temperature rise and the like which are caused by poor heat dissipation condition when an embedded mounting ventilating fan operates are effectively solved, a heat dissipation effect is improved, the motor temperature rise and energy consumption are lowered, the service life of the motor is prolonged, and the efficiency of the whole ventilating fan is increased, and the product safety is ensured. Moreover, compared with the prior art, the efficient household ventilating fan also has the characteristics of convenience in maintenance and easiness in motor changing.