The invention relates to a fully automatic thinprep cytology processing and dyeing device, which comprises a rack, a sample placing area arranged on a platform of the rack, a pipetting mechanism arranged in the sample placing area, a processing mechanism arranged beside the sample placing area, and a dyeing mechanism. The objective of the invention is to provide a fully automatic thinprep cytology processing and dyeing device. The fully automatic thinprep cytology processing and dyeing device provided by the invention has the advantages that 1, a circular region formed by the processing mechanism is intersected with or tangent to the sample placing area, the pipetting mechanism is arranged at the center of a circle of the sample placing area, the sampling, liquid adding, cleaning, waste liquid absorbing and other operations can be completed by one pipetting mechanism, the whole structure is simplified, and the manufacturing cost is saved; 2, the pipetting mechanism is provided with a cleaning assembly A for washing the inner tube wall of an inner suction tube, an outer also sleeves the inner suction tube, and a cleaning assembly B is matched, so that the outer tube wall of the inner suction tube can be washed, and thus the pollution preventing effect is achieved.