A solar protection device capable of being reeled comprises a mounting unit, a solar protection unit and a reeling mechanism. The mounting unit comprises two spaced end seats, the solar protection unit comprises a reel, a curtain fabric and two linkage parts, the curtain fabric is reeled on the reel, by the aid of the two linkage parts, the reel capable of rotating along a self axis is erected between the end seats, the reeling mechanism is mounted on one of the end seats and comprises a torsion rotating wheel, a take-up and pay-off wheel and constant torsion spiral spring, the torsion rotating wheel is combined with one of the linkage parts in a linkage manner, and the constant torsion spiral spring is reeled on the take-up and pay-off wheel and leads the torsion rotating wheel to have reeling resetting force. The reeling mechanism is arranged on one of the end seats and accordingly can be mounted conveniently, furthermore, limitation to the size of the reeling mechanism can be avoided, and the reeling resetting force of the solar protection device is further increased.