The invention provides an optical fiber righting protector for carbon dioxide oil displacement and storage in a monitoring well. The optical fiber righting protector comprises an upper round card, a lower round card and a plurality of lantern columns, wherein the upper round card comprises a first semicircle card and a second semicircle card, the first semicircle card and the second semicircle card are rotatably connected by a hinge, and the lower round card and the upper round card are arranged in the same structure; and the upper round card and the lower round card are fixedly connected through the multiple lantern columns fixed to the outer sides of the upper round card and the lower round card, the lantern columns are specifically made of elastic iron sheets, and the first semi-circular cards and the second semi-circular cards of the upper round card and the lower round card are internally provided with optical fiber protecting grooves for fiber penetration and protection. The problems that the installation fails due to the fact that the downward tension force which the optical fiber is subjected to is further increased larger and larger when the optical fiber is installed in the monitoring well, and the installation of the optical fiber is more difficult due to the fact that a positive role cannot be played on the optical fiber due to the fact that a centralizer used for avertical well, an inclined well or a horizontal well only plays a righting role at present are solved.