The utility model provides a
pipette pipetting auxiliary device which comprises a filter structure and an auxiliary structure which correspond to a
pipette, the filter structure comprises a filter
cartridge, a clamping and fixing structure is arranged on the filter
cartridge, the auxiliary structure comprises an auxiliary sleeve, the auxiliary sleeve corresponds to the
pipette, a first blocking block is arranged in the auxiliary sleeve in a sliding fit mode, and a second blocking block is arranged in the auxiliary sleeve. An
ear washing bulb is arranged on the auxiliary sleeve, a through groove is formed in the first blocking block, a second blocking block is arranged in the through groove, and the through groove corresponds to the
ear washing bulb. According to the utility model, the clamping and fixing structure is arranged on the filter
cartridge, the filter cartridge can be arranged in a
beaker, so that liquid in the
beaker can be conveniently filtered, a pipette is prevented from being blocked during pipetting, the first blocking block is arranged in the auxiliary sleeve in a sliding manner, the through groove is formed in the first blocking block, and the second blocking block is arranged in the through groove; the auxiliary sleeve can be blocked through the first blocking block, finger blocking is not needed, liquid is prevented from touching fingers, and the liquid can be controlled to flow out by directly pushing the push rod.