Milling and reaming cutter with guiding function

The invention discloses a milling and reaming tool with a guiding function, and relates to the technical field of milling and reaming tools. Comprising a cutting edge part, a clearance edge part and a clamping handle part, and the cutting edge part and the clamping handle part are arranged at the two ends of the clearance edge part; a mounting groove and a positioning hole are formed in the circumference of the clearance blade part, a guide round sleeve is arranged on the mounting groove in a sliding fit manner, the guide round sleeve comprises a mounting plate, a guide ring is fixedly connected to the mounting plate, the mounting plate is mounted on the mounting groove in a sliding manner, and the mounting plate is matched with the positioning hole for positioning and fixing; an auxiliary plate is in sliding fit with the positioning hole; a buckling piece is arranged in the cutting edge part, and the auxiliary plate and the mounting plate are fixed through the buckling piece; an adjusting piece is rotational