The invention discloses convenient-to-dehumidify suspension cable protective structure, which comprises an upper end anchorage component, a lower end anchorage component and a cable. The upper end anchorage component comprises an upper anchorage cup and an upper end connection barrel; the lower end anchorage component comprises a lower anchorage cup and a lower end connection barrel; the upper anchorage cup is internally provided with an air inlet reserved space; the lower anchorage cup is internally provided with an air outlet reserved space. The convenient-to-dehumidify suspension cable protective structure comprises an air inlet pipe, an air inlet passage, an air outlet passage and an air outlet pipe. The air inlet pipe is inserted into the air inlet reserved space; one end of the air inlet pipe is communicated with the interior of the air inlet reserved space while the other end is communicated to the top end of a PE protective sleeve; the air outlet pipe is inserted into the air outlet reserved space; one end of the air outlet pipe is communicated with the interior of the air outlet reserved space while the other end is communicated to the bottom end of the PE protective sleeve. By feeding of clean and dry air into a suspension cable, an internal durable dry environment of the suspension cable is constantly kept, and parallel steel wires in the suspension cable are protected from corrosion, so that the service life of the cable is prolonged effectively.