The invention provides a vehicle-mounted awning. The vehicle-mounted awning comprises a vehicle-mounted awning cloth frame and a combined type awning body. The vehicle-mounted awning cloth frame comprises a main awning assembling frame and an auxiliary awning assembling frame. The main awning assembling frame and the auxiliary awning assembling frame are each of a long strip-shaped structure and both fixedly mounted at the top of a compartment. Box type awning cloth frames are arranged on the two sides of the bottom of the auxiliary awning assembling frame correspondingly. Awning cloth bins are arranged in an inner cavity of the main awning assembling frame and inner cavities of the box type awning cloth frames correspondingly. Elastic winding drums are arranged in the awning cloth bins. The combined type awning body comprises roof awning cloth, side awning cloth, rear shielding awning cloth and front shielding awning cloth, and the roof awning cloth, the side awning cloth, the rear shielding awning cloth and the front shielding awning cloth are mounted in the awning cloth bins correspondingly. The vehicle-mounted awning is integrally combined with the vehicle compartment, can move conveniently along with a vehicle and can also be erected on the roof of the vehicle at any time for shielding sunlight, the sunlight is prevented from directly irradiating the roof of the compartment, and thus the temperature in the compartment is prevented from being too high. In this way, the vehicle-mounted awning is reasonable in structure and convenient to use.