A combination structure, comprising: a locking set comprising a locking plate and a locking piece, the locking plate comprising a plate body and a plurality of blocking pieces, wherein the plurality of blocking pieces are arranged in pair and spacedly on the plate body, an insertion space is defined on the locking plate, and the locking plate is rotatable; and a track, comprising a column and a sliding slot disposed on the column, the column comprising a fixing plate and a pair of wings bent and extended from two sides of the fixing plate, wherein the pair of wings and the sliding slot are arranged on two sides of the fixing plate opposite to each other; wherein, the track is combined through the locking plate being configured to rotate to make the pair of wings penetrate into the insertion space and be blocked by the blocking pieces; characterized in that said combination structure further comprises: a decorative rod, comprising a rod body and an L-shaped opening disposed on a side of the rod body, the L-shaped opening extended from one end of the rod body to another end of the rod body; a plurality of said locking sets, arranged spacedly in the L-shaped opening; wherein the track is further combined in the L-shaped opening; wherein the decorative rod further comprises a pair of decorative heads, and the pair of decorative heads are combined on two ends of the rod body; and wherein the decorative rod further comprises a pair of end plates and a plurality of screws, and the pair of end plates are respectively arranged between each of the decorative heads and each end of the rod body through the screws. a locking set comprising a locking plate and a locking piece, the locking plate comprising a plate body and a plurality of blocking pieces, wherein the plurality of blocking pieces are arranged in pair and spacedly on the plate body, an insertion space is defined on the locking plate, and the locking plate is rotatable; and a track, comprising a column and a sliding slot disposed on the column, the column comprising a fixing plate and a pair of wings bent and extended from two sides of the fixing plate, wherein the pair of wings and the sliding slot are arranged on two sides of the fixing plate opposite to each other; wherein, the track is combined through the locking plate being configured to rotate to make the pair of wings penetrate into the insertion space and be blocked by the blocking pieces; characterized in that said combination structure further comprises: a decorative rod, comprising a rod body and an L-shaped opening disposed on a side of the rod body, the L-shaped opening extended from one end of the rod body to another end of the rod body; a plurality of said locking sets, arranged spacedly in the L-shaped opening; wherein the track is further combined in the L-shaped opening; wherein the decorative rod further comprises a pair of decorative heads, and the pair of decorative heads are combined on two ends of the rod body; and wherein the decorative rod further comprises a pair of end plates and a plurality of screws, and the pair of end plates are respectively arranged between each of the decorative heads and each end of the rod body through the screws. a decorative rod, comprising a rod body and an L-shaped opening disposed on a side of the rod body, the L-shaped opening extended from one end of the rod body to another end of the rod body; a plurality of said locking sets, arranged spacedly in the L-shaped opening; wherein the track is further combined in the L-shaped opening; wherein the decorative rod further comprises a pair of decorative heads, and the pair of decorative heads are combined on two ends of the rod body; and wherein the decorative rod further comprises a pair of end plates and a plurality of screws, and the pair of end plates are respectively arranged between each of the decorative heads and each end of the rod body through the screws.