Cotton separation device of cotton picking machine

The invention discloses a cotton separation device of a cotton picking machine, which separates cotton while picking and realizes a good separation effect. Particularly, when collecting the cotton with dew, a shell and a cotton conveying pipe are not blocked easily. The device comprises a shell (9), wherein a belt (10) driven by power is mounted in the shell (9); a picking needle (6) is mounted on the belt (10); and one end of the shell (9) is a picking port. The device is characterized in that a cotton conveying pipe (8) is mounted at the picking port; a cotton separation plate is mounted in the cotton conveying pipe (8) and separates the cotton picked by the picking needle (6) from the picking needle (6); and meanwhile, according to the moving direction of the picking needle (6), the shell (9) is also provided with an auxiliary cotton separation plate behind the cotton separation plate. The device disclosed by the invention has a simple structure; the design of the whole machine is reasonable, and the devic