The invention discloses a flexible coiled material for deformation joint and a construction method of the flexible coiled material. The flexible coiled material comprises a deformation portion and an extending portion, wherein the deformation portion is located in the middle and is provided with an arc-shaped curve, the extending portion is provided with two parts, the two parts are connected with the deformation portion from two sides of the deformation portion, thus, the flexible coiled material is fixed on two sides of the deformation joint through two parts of the extending portion, the deformation portion of the flexible coiled material covers the deformation joint, the flexible coiled material has a tensile property and also has the deformation portion, and can bear deformation and expansion of the deformation joint in a certain range, the effect of complete sealing can be achieved, the structure is table and the sealing performance is good.