Bicycle saddle with fixed height

The invention relates to the technical field of bicycles and discloses a bicycle saddle with a fixed height. A saddle is included. A connecting column is fixedly mounted at the bottom of the saddle; asupporting column is movably mounted at the bottom of the connecting column; a bracket is fixedly mounted at the bottom of the saddle; a mounting ring is fixedly mounted at the bottom of the bracket;a mounting plate is fixedly mounted in the mounting ring; a fixed block is fixedly mounted at the bottom of the mounting plate; a cavity is formed in the fixed block; a threaded sleeve is fixedly mounted at the bottom of the connecting column; a baffle is fixedly mounted at the bottom of the threaded sleeve; and a through hole is formed in the baffle, a fixing shaft is movably installed in the through hole, a lower plate is fixedly installed at the top of the fixing shaft, a ratchet wheel is movably installed at the top of the lower plate, and an upper plate is movably installed at the top ofthe ratchet wheel. The hei