Reference seat and machining tool

The utility model discloses a reference seat and a machining tool, the reference seat comprises a fixed seat, and positioning grooves are formed in the upper surface of the fixed seat at intervals; the adjusting seat comprises a body part, a first protrusion part and a second protrusion part, the body part is provided with a first surface and a second surface which are oppositely arranged, the first protrusion part is arranged on the first surface, the second protrusion part is arranged on the second surface, and a height difference exists between the first protrusion part and the second protrusion part; wherein the reference seat can be switched between a first reference position and a second reference position, when the reference seat is located at the first reference position, the firstprotruding part is contained in the positioning groove, the first surface is in contact fit with the upper surface of the fixing seat, and when the reference seat is located at the second reference position, the second protr