The invention discloses an installation structure of a buckle type movable decorative sheet. The installation structure comprises a fixed buckle piece (1), an upper movable decorative sheet (2) and a lower movable decorative sheet (3), wherein the back surface of the upper movable decorative sheet (2) is provided with an upper groove (21), the bottom of the upper movable decorative sheet (2) is provided with a bottom groove (22), and the back surface of the lower movable decorative sheet (3) is provided with a lower groove (31); the upper part of the front side of the fixed buckle piece (1) is provided with an upper convex strip (11) used for being matched with the upper groove (11), the middle part of the front side of the fixed buckle piece (1) is provided with an upwards tilted middle convex strip (12) used for being matched with the bottom groove (22), and the lower part of the front side of the fixed buckle piece (1) is provided with a lower convex strip (13) used for being matched with the lower groove (31); and the upper movable decorative sheet (2) and the lower movable decorative sheet (3) are respectively fixedly arranged on the fixed buckle piece (1). According to the installation structure disclosed by the invention, damages and cross contamination brought by other subdivisional work constructions after finished wood products are installed can be avoided; and the protection cost and the maintenance cost of the finished products are reduced, and the construction effect is improved.