Cleaning tool for sample bottle diffusion cap

The embodiment of the utility model provides a cleaning tool for a sample bottle diffusion cover. The cleaning tool comprises a cleaning brush and a driving assembly used for driving the cleaning brush to rotate and brush. The driving assembly comprises a base, a rotating piece and a moving piece, the rotating piece is rotatably installed in an installation groove of the base, the brush rod is vertically arranged on the rotating piece, and the moving piece is arranged on the rotating piece in a sliding and sleeving mode; a sliding groove spirally extending in the circumferential direction of the rotating piece is formed in the peripheral face of the rotating piece, and a sliding block matched with the sliding groove is arranged on the inner side wall of the moving piece. After the diffusion cover is inverted and arranged on the cleaning brush in a sleeving mode, the diffusion cover only needs to be pressed downwards to drive the moving part to move downwards, the rotating part can drive the cleaning brush to