Lugang Bridge is a 102 m+208 m+102 m semi-floating system cable-stayed bridge. Its main girder is a orthotropic board streamline flat integral steel box girder. The parallel steel strand stayed cable system is used for its stayed cable. Its main pylon is a latticed column steel-concrete composite structural "gate"-shaped pylon. Its pylon type and the stayed cable anchor system designed for this special pylon type are introduced in detail, which has the important referring values for the design of the similar cable-stayed bridges.