Protective cover of linear cutting machine tool

The utility model discloses a protective cover for a linear cutting machine, which belongs to the technical field of linear cutting machine protection and comprises a top plate, a framework is fixedly connected to the lower end of the top plate, a first glass door, a second glass door and a third glass door are symmetrically arranged on the side portion of the framework, and the rear portion of the first glass door is rotatably connected with the framework. The rear portion of the second glass door is rotationally connected with the first glass door, the rear portions of the third glass doors are rotationally connected with the second glass door, and the symmetrically-arranged third glass doors are matched with each other in a magnetic attraction mode. When a linear cutting machine tool on the side of the framework needs to be operated, the third glass door is opened, then the first glass door, the second glass door and the third glass door are folded mutually, then the first glass door is turned over backwar