Sucking-pipe cotton harvester

The utility model relates to a sucking-pipe cotton harvester, which comprises a frame and a driving mechanism; the frame is provided with a piston type compression cylinder, the front end of the cylinder is provided with a cotton settling chamber which is communicated with the cylinder by a passage which is provided with a filter sieve, and the settling chamber is provided with a cotton picking sucking-pipe and a cotton discharging pipe; the nozzle of the cotton picking sucking-pipe is provided with a one-way valve which only can be opened towards the inside direction of the chamber, and the nozzle of the cotton discharging pipe is provided with a one-way valve which only can be opened towards the outside direction of the chamber. The utility model has simple structure and high picking efficiency, and mitigates the labor intensity for picking cotton.