Cotton fiber sample bale breaker

The invention provides a cotton fiber sample bale breaker which comprises a bale breaking module, a cotton taking module and a conveying module, the bale breaking module is fixedly arranged above the conveying module, and the cotton taking module is arranged above the bale breaking module; the unpacking module comprises a first support, an upper cover taking device arranged on the upper portion of the support and a lower cover taking device arranged below the support, and a positioning device is arranged on the side face of the first support. The conveying module comprises a hollow conveying belt and a bearing device for bearing the cotton fiber sample, and the bearing device is arranged below the hollow conveying belt. The cotton taking module comprises an air cylinder set which is provided with a lifting device connected with the first support, and a cotton pressing plate is arranged at the lower end of an air cylinder push rod in the air cylinder set. And the position of the cotton taking module correspond