A cutting machine includes a platform, two supporting elements, a sliding plate, a handle and a blade assembly. The supporting elements are supported on the platform. Each of the supporting elements includes a space. The sliding plate is inserted in the space of the first supporting element and includes a slot. The handle includes a pivoting plate and an axle. The pivoting plate is inserted in the space of the second supporting element, and includes a primary aperture and a secondary aperture. The axle is inserted in the primary aperture of the pivoting plate and an aperture of the second supporting element. The blade assembly includes a blade and two pins. The first pin is inserted in an aperture of the blade and movably inserted in the slot. The second pin is inserted in another aperture of the blade and the secondary aperture of the pivoting plate.