Cleaning brush capable of being used for conical flask

The utility model provides a cleaning brush for a conical flask, which comprises a central rod, a mounting cavity is formed in the central rod, and a mounting hole is formed in the side wall of the mounting cavity; the sleeve sleeves the outer wall surface of the center rod in a sliding manner; the rotating rod piece is rotationally connected into the mounting cavity; and the cleaning brush is arranged at the bottom of the rotating rod piece, and the cleaning brush is restrained in the sleeve. By additionally arranging the sleeve, when the device is specifically used, on one hand, it is guaranteed that the originally-restrained cleaning brush expands or expands in the conical flask, the interior of the conical flask is comprehensively cleaned, and the cleaning efficiency and quality are improved; on the other hand, the sleeve can be sleeved on the opening of the conical flask, so that the stability of the conical flask is ensured, and the conical flask is prevented from falling off and being damaged. 本实用新型提供了