The utility model discloses a do not demolish closure section template system of external mold, including die block board, outside template and inboard template, the bridge cantilever section end of having pour is pre-buried to have the built-in fitting, and die block board and outside template are fixed in the built-in fitting through outside form cage on, inboard template is passed through the centre form and is supported on the web inboard and bottom plate of bridge cantilever section end, die block board, outside template and outside form cage are within the design outline line of bridge. Die block board, outside template and outside form cage etc. Become the partly of the permanent structure of bridge after the construction is accomplished. Do not establish the pull rod between inboard template and the outside template. Can realize the construction of closure section under the limited condition of existing building safe distance such as high-voltage line that the bridge crossed over under rather than planning to build.