Position-adjustable dust and dirt collecting device

The utility model discloses a position-adjustable dust and dirt collecting device which is used for an electric tool and comprises a dust collecting cover and a dust collecting cover supporting and pressing mechanism. The dust collecting cover comprises a cover body, a dust collecting opening formed in the front end of the cover body and a connecting hole formed in the rear end of the cover body,the dust collecting opening is used for abutting against the to-be-machined surface of the workpiece, and a drill bit of the electric tool penetrates through the connecting hole; the dust hood furthercomprises a rotary adjusting assembly, the rotary adjusting assembly comprises a hoop and a fastener, the hoop is arranged on the hood body in a sleeving mode, the side wall of the hoop is provided with a supporting part extending outwards, and the supporting part is used for being connected with the dust hood supporting and pressing mechanism. The fastener is used for fastening the clamp, and the axial rotating position