The invention discloses an automobile automatic spraying sun shielding block, and belongs to the field of automation. The automobile automatic spraying sun shielding block is put on a platform of a front windshield of an automobile; a sun shielding plate is used for being attached to the windshield to achieve a sun shielding effect. When the temperature in an automobile is higher than 40 DEG C, a water pump automatically pumps water from a water tank; the water is sprayed out through a spraying head and is used for lowering the temperature in the space in the automobile; or, the remote operation is manually performed to perform spraying temperature reduction. The automobile automatic spraying sun shielding block has the beneficial effects that the automobile automatic spraying sun shielding block can achieve the sun shielding effect; the fast rise of the temperature in the automobile and the automobile insolation can be prevented; the automatic spraying or manual operation spraying temperature reduction can be fast performed; an automobile owner can conveniently check the temperature in the automobile at any time.