The invention relates to a branch type film covering bracket as well a conveying system and a release method thereof. The branch type film covering bracket comprises a main bracket, a branch bracket and an independent bracket; the main bracket comprises a metal skeleton and a covering film; the metal skeleton comprises a plurality of elastic metal rings, and a node of each of the elastic metal rings is inverted V-shaped; the two elastic metal rings which are incompletely covered with the covering film are arranged at the front end of the metal skeleton, namely the first metal ring and the second metal ring from outside to inside in sequence; a guide ring is arranged at the top end of each of inverted V-shaped nodes of the second metal ring; a control line is arranged in the metal skeleton, and the outer end of the control line is sequentially arranged in each of the guide rings in a penetrating manner; the branch bracket is a tube body with a mesh-shaped outer wall and is arranged at one end, close to the second metal ring, on the side surface of the main bracket; the diameter of the branch bracket gradually reduces from inner end to outer end, and the inner end of the branch bracket can be folded to be parallel to the main bracket; a positioning guide wire is also arranged in the metal skeleton; the independent bracket is a tube-shaped covering film bracket capable of expanding outwards in the radial direction and is arranged inside the branch bracket.