The invention discloses a cotton plucking bearer disk which comprises a shell and blades. The shell comprises a first end cover and a second end cover which are parallel each other, hinge shafts are peripherally and equidistantly distributed in the first end cover, the number of the blades is the same as that of the hinge shafts, the blades are hinged onto the corresponding hinge shafts and clamped in the middle by the first end cover and the second end cover, and the first end cover is detachably connected with the second end cover. According to the cotton plucking bearer disk, overturning angles and exposed heights of the blades can be controlled as required, states of the blades can be adjusted, the cotton plucking bearer disk is independently modular, a plurality of cotton plucking bearer disks can be parallelly mounted on a rotating shaft of a cotton plucker as required, overall specifications of a cotton plucking bearer are adjusted, and the cotton plucking bearer disk has high flexibility and variability.