Cutting device capable of automatically positioning sectional material

A cutting device capable of automatically positioning profiles comprises a cutting assembly, a positioning assembly and a switch assembly. The output end of the cutting driver is connected to the saw blade and used for driving the saw blade to rotate. The length input device is in communication connection with the positioning and moving assembly, and the length input device is used for inputting the cutting length needed by the profile and driving the baffle to move on the positioning and moving assembly, and the distance between the moved position of the baffle and the saw blade is made to be equal to the cutting length; the switch is mounted on the baffle plate; the switch is used for starting the cutting driver and the movable driver, and the sectional material is cut off through the saw blade. The cutting device is used for positioning the sectional material, the positioning moving assembly can automatically move to the designated position only by inputting the length, needing to be cut, of the sectional