The invention discloses a full-scale convenience roof protection canopy support for cars. The full-scale convenience roof protection canopy support comprises an upper circular plate, a ring, a lower circular plate and the like. The upper circular plate is connected with four upper rods, the ring is connected with four upper middle rods and four lower middle rods, and the lower circular plate is connected with four lower rods. The upper rods and the upper middle rods are jointly abutted against four groups of telescoping mechanisms, and the lower middle rods and the lower rods are jointly abutted against four groups of telescoping mechanisms. The upper circular plate and the lower circular plate are fixed relatively to form a whole to clamp the ring in the middle, the ring is capable of horizontally rotating relative to the whole, and accordingly the eight groups of telescoping mechanisms are capable of telescoping in eight directions synchronously when the ring rotates relatively. The full-scale convenience roof protection canopy support for the cars is low in cost, novel in structure and available for one-person single-hand operations and can be matched with awning cloth to realize full-scale roof shielding of the cars.